WO2018027592A1 - 生物信息传感装置和电子设备 - Google Patents

生物信息传感装置和电子设备 Download PDF

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Publication number
WO2018027592A1
WO2018027592A1 PCT/CN2016/094243 CN2016094243W WO2018027592A1 WO 2018027592 A1 WO2018027592 A1 WO 2018027592A1 CN 2016094243 W CN2016094243 W CN 2016094243W WO 2018027592 A1 WO2018027592 A1 WO 2018027592A1
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WO
WIPO (PCT)
Prior art keywords
sensing
control switch
electrode
biological information
reference signal
Prior art date
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PCT/CN2016/094243
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English (en)
French (fr)
Inventor
李问杰
Original Assignee
深圳信炜科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳信炜科技有限公司 filed Critical 深圳信炜科技有限公司
Priority to CN201680000681.9A priority Critical patent/CN106415600B/zh
Priority to PCT/CN2016/094243 priority patent/WO2018027592A1/zh
Publication of WO2018027592A1 publication Critical patent/WO2018027592A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/16—Human faces, e.g. facial parts, sketches or expressions

Definitions

  • the present invention relates to the field of biometric information sensing technologies, and in particular, to a biometric information sensing device and an electronic device having the bioinformation sensing device.
  • bio-information sensing devices are becoming standard equipment for electronic devices.
  • more and more mobile terminals use fingerprint sensing devices, face recognition sensing devices, eye-pattern recognition sensing devices, and the like.
  • the biometric information sensing device includes a plurality of sensing electrodes arranged in an array and a driving circuit coupled to each of the sensing electrodes.
  • the drive circuit typically drives the sensing electrodes row by row to perform biometric information sensing.
  • the driving circuit when the driving circuit provides an excitation signal to a sensing electrode and drives the sensing electrode to perform biometric information sensing, the driving circuit does not provide a voltage signal to the remaining sensing
  • the voltages on the remaining sensing electrodes may be inconsistent due to signal interference, etc., so the parasitic effects on the sensing electrodes performing the biological information sensing are different and unknown, and the biological information sensing device senses
  • the measurement accuracy requirement is relatively high, which is not conducive to the accurate detection of biological information.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention needs to provide a biological information sensing device and an electronic device.
  • the invention provides a biological information sensing device, comprising:
  • a driving circuit connected to the plurality of sensing electrodes for driving the plurality of sensing electrodes to perform biometric information sensing
  • a first reference signal is provided to some or all of the remaining sensing electrodes.
  • the first reference signal is the same as the excitation signal.
  • a second reference signal is provided to the other sensing electrode.
  • the second reference signal is the same as the first reference signal.
  • the driving circuit simultaneously provides an excitation signal to the partial sensing electrodes to perform biological information sensing, and provides the second reference signal to some or all of the remaining sensing electrodes Measuring electrode.
  • the driving circuit simultaneously drives a portion of the sensing electrodes to perform biometric information sensing, and by driving a plurality of times until the driving of one row of sensing electrodes performs biometric information sensing.
  • the driving circuit provides the excitation signal to the sensing electrode
  • the sensing signal from the sensing electrode output is further received to perform self-capacitance biological information sensing.
  • the biometric information sensing device comprises a plurality of sensing units, and the sensing unit comprises:
  • the sensing electrode The sensing electrode
  • the driving circuit includes:
  • a scan driving circuit is respectively connected to the first control switch and the second control switch of the plurality of sensing units for driving the first control switch and the second control switch in the same sensing unit to be turned on and off;
  • sensing driving circuit connected to the sensing electrode through the first control switch, configured to provide the excitation signal to the sensing electrode to perform biological information sensing through the turned-on first control switch;
  • a reference signal generating circuit connected to the sensing electrode through the second control switch for providing the first reference signal to the sensing electrode through the turned-on second control switch.
  • the scan driving circuit drives the first control switch of one of the sensing units to be turned on and the second control switch is turned off, the first control switch for driving some or all of the remaining sensing units is turned off, and the second The control switch is turned on, and the reference signal generating circuit supplies the first reference signal to the sensing electrode through the second control switch that is turned on.
  • the sensing driving circuit provides the excitation signal to the sensing electrode to perform biometric information sensing through the turned-on first control switch, and receives the sensing signal from the sensing electrode output to acquire biometric information.
  • the sensing driving circuit simultaneously provides the excitation signal through the first control switch that is turned on.
  • Biometric information sensing is performed on a portion of the sensing electrodes, the reference signal generating circuit providing the same second reference signal to the sensing electrodes of some or all of the remaining sensing units through the turned-on first control switch.
  • the driving circuit further includes a plurality of data selectors, the plurality of data selectors are connected to the reference signal generating circuit and the sensing driving circuit, and each data selector is further connected by a first control switch a sensing electrode of a portion of the sensing unit, the data selector for selectively outputting the excitation signal or the second reference signal to the sensing electrode.
  • the driving circuit simultaneously outputs the excitation signal through each data selector to perform biometric information sensing on a sensing electrode, and respectively output the second reference signal to the same row through each data selector. Some or all of the remaining sensing electrodes are sensing electrodes.
  • the biometric information sensing device further includes a control unit, the control unit is respectively connected to the scan driving circuit and the plurality of data selectors, and is configured to control the scan driving circuit to drive each row of sensing units And a turn-on timing of the first control switch and the second control switch, and controlling a timing of outputting the excitation signal and the second reference signal to the sensing electrode by controlling the plurality of data selectors.
  • the control unit is respectively connected to the scan driving circuit and the plurality of data selectors, and is configured to control the scan driving circuit to drive each row of sensing units And a turn-on timing of the first control switch and the second control switch, and controlling a timing of outputting the excitation signal and the second reference signal to the sensing electrode by controlling the plurality of data selectors.
  • the biometric information sensing device further includes:
  • the scan line group including a first scan line and a second scan line
  • the data line group including a first data line and a second data line;
  • Each scan line group is connected to one row of sensing units, and each data line group is connected to one column of sensing units;
  • the first control switch includes a control electrode, a first transfer electrode, and a second transfer electrode;
  • the second control switch includes a control electrode, a first transfer electrode, and a second transfer electrode;
  • the first scan line connection a scan driving circuit and a control electrode of the first control switch;
  • the second scan line connecting the scan driving circuit and the control electrode of the second control switch;
  • the first data line connecting the data selector And a first transmission electrode of the first control switch;
  • the second data line is connected to the first transmission electrode of the reference signal generation circuit and the second control switch;
  • the second transmission electrode of the first control switch is connected to the sense a measuring electrode;
  • a second transmitting electrode of the second control switch is connected to the sensing electrode.
  • the first data line is used to transmit the excitation signal and the second reference signal
  • the second data line is used to transmit the first reference signal
  • the scan driving circuit passes the a scan line and a second scan line provide a scan enable signal to the first control switch and the second control switch to control the first control switch and the second control switch to be turned on, and are provided by the first scan line and the second scan line
  • the scan cutoff signal is applied to the first control switch and the second control switch to control the first control switch and the second control switch to be turned off.
  • the biometric information sensing device further includes:
  • a first reference signal line connecting the reference signal generating circuit and the second data line, for transmitting the first reference signal
  • sensing signal line connecting the sensing driving circuit and the plurality of data selectors for transmitting the excitation signal to the sensing electrode and transmitting the sensing signal from the sensing electrode to the sensing driving circuit.
  • the biometric information sensing device includes a biometric information sensor, the biometric information sensor includes an insulating substrate, the plurality of sensing units, the plurality of scan line groups, and the plurality of data line groups And the first reference signal line, the plurality of sensing units, the plurality of scan line groups, the plurality of data line groups, and the first reference signal line are formed on the insulating substrate on.
  • the first control switch and the second control switch in each of the sensing units are thin film transistor switches, and the insulating substrate is a glass substrate.
  • the sensing unit includes a first control switch and a second control switch, or the sensing unit includes two first control switches connected in parallel and two second control switches connected in parallel.
  • the insulating substrate includes a first surface and a second surface disposed opposite to the first surface, the first surface is configured to receive a touch or proximity input of the target object, the plurality of sensing units, the A plurality of scan line groups, the plurality of data line groups, and the first reference signal line are disposed on the second surface.
  • the sensing electrodes of the plurality of sensing units are compared to the first control switch, the second control switch, the plurality of scan line groups, and the plurality of data line groups Closer to the second surface.
  • the first control switch, the second control switch, the plurality of scan line groups, and the plurality of data line groups are located opposite to the sensing electrodes of the plurality of sensing units One side of the insulating substrate.
  • the sensing electrodes of the plurality of sensing units cover the first control switch, the second control switch, the plurality of scan line groups, and the plurality of data line groups.
  • the biometric information sensor further includes the scan driving circuit, the plurality of data selectors, the second reference signal line, and the sensing signal line, the scan driving circuit, the plurality of The data selector, the second reference signal line, and the sensing signal line are formed on the second surface of the insulating substrate.
  • the scan driving circuit, the plurality of data selectors, the second reference signal line, and the sensing signal line are disposed around the plurality of sensing units.
  • the scan driving circuit and the plurality of data selectors each include a control switch, and the control switches are all thin film transistor switches.
  • each data selector comprises a plurality of switch units, each switch unit comprising a first selection switch and a second selection switch, the first selection switch comprising a control electrode, a first transfer electrode, and a second transfer electrode
  • the second selection switch includes a control electrode, a first transmission electrode, and a second transmission electrode, wherein the control electrode of the first selection switch and the control electrode of the second selection switch are respectively connected to the control unit, a first transmission electrode of the first selection switch is connected to the sensing driving circuit, and a first transmission electrode of the second selection switch is connected to the reference signal generating circuit, and the first selection switch
  • the second transfer electrode is connected to the second transfer electrode of the second selection switch and is connected to the first data line.
  • control unit controls the first selection switch and the second selection switch of the same switching unit to be turned on in time.
  • the biometric information sensor further includes a passivation layer formed on the plurality of sensing units, the plurality of scan line groups, the plurality of data line groups, and the first reference signal on-line.
  • the biometric information sensing device further includes a control chip, the control chip including the control unit, the reference signal generating circuit, and the sensing driving circuit.
  • the biometric information sensor and the control chip are respectively dies, and the control chip is bound on the insulating substrate; or the control chip is disposed on a flexible circuit board, A flexible circuit board is electrically coupled to the biometric information sensor.
  • the driving circuit further includes a modulation circuit, configured to uniformly modulate a signal output by the driving circuit to the plurality of sensing units to improve a signal to noise ratio of the sensing signal.
  • a modulation circuit configured to uniformly modulate a signal output by the driving circuit to the plurality of sensing units to improve a signal to noise ratio of the sensing signal.
  • the biometric information sensing device is a self-capacitive sensing device.
  • the biometric information sensing device is a fingerprint sensing device.
  • the biometric information sensing device of the present invention further provides the first reference signal to the sensing electrodes of some or all of the remaining sensing electrodes of the same column while driving the sensing electrodes to perform biometric information sensing,
  • the parasitic influence of the sensing electrode pair of the first reference signal on performing the sensing electrode is known. Accordingly, the driving circuit can eliminate the known parasitic influence in the process of acquiring the biological information, thereby improving the biological information. Sensing accuracy.
  • the biometric information sensing device provides a second reference signal to the sense of part or all of the remaining sensing electrodes in the same row when the partial sensing electrodes in each row of sensing electrodes are driven to perform biometric information sensing.
  • Measuring electrodes, such that the sensing electrode pairs to which the second reference signal is applied are known to have a parasitic effect on the sensing electrodes that are sensed, and accordingly, the driving circuit can be eliminated in the process of acquiring biological information. Parasitic effects, thereby improving the accuracy of biological information sensing.
  • the biometric information sensing device further includes an insulating substrate, a plurality of sensing units, and a protective cover, wherein the plurality of sensing units are disposed between the insulating substrate and the protective cover, A protective cover is disposed on a side of the plurality of sensing units for receiving a touch or proximity input of the target object, wherein each sensing unit includes a sensing electrode and a sensing connected to the sensing electrode Circuit.
  • the biometric information sensing device further includes an insulating substrate, a plurality of sensing units, and a coating layer, the plurality of sensing units being disposed between the insulating substrate and the coating layer, a coating layer facing away from a side of the plurality of sensing units for receiving a touch or proximity input of a target object, wherein each sensing unit includes a sensing electrode and a sensing coupled to the sensing electrode Circuit.
  • the sensing circuit includes a first control switch and a second control switch, and is connected to the sensing electrode, wherein the first control switch is configured to control whether to transmit an excitation signal to the sensing electrode, where The second control switch is configured to control whether to transmit the first reference signal to the sensing electrode, and the first control switch and the second control switch are time-divisionally turned on.
  • the invention further provides an electronic device comprising the biological information sensing device of any of the above.
  • the electronic device includes the biometric information sensing device, the user experience of the electronic device is high.
  • FIG. 1 is a schematic diagram showing the circuit structure of an embodiment of a biological information sensing apparatus according to the present invention.
  • Fig. 2 is a plan view showing a part of the structure of the biological information sensing device shown in Fig. 1.
  • FIG. 3 is a circuit diagram showing an embodiment of a data selection circuit of the biometric information sensing device shown in FIG. 1.
  • FIG. 4 is a schematic structural view of another embodiment of a biological information sensing device of the present invention.
  • FIG. 5 is a partial cross-sectional structural view of the biological information sensing device shown in FIG. 4.
  • FIG. 5 is a partial cross-sectional structural view of the biological information sensing device shown in FIG. 4.
  • Fig. 6 is a view showing a state of use of the biometric information sensing device shown in Fig. 4.
  • FIG. 7 is a flow chart showing a method of fabricating an embodiment of the biometric information sensor shown in FIG.
  • FIG. 8 is a flow chart of a method of making a first control switch and a second control switch.
  • FIG. 9 is a partial structural schematic view of still another embodiment of the biological information sensing device of the present invention.
  • Fig. 10 is a plan view showing another embodiment of a sensing unit of the biological information sensing device of the present invention.
  • FIG. 11 is a partial structural schematic view of still another embodiment of the biological information sensing device of the present invention.
  • FIG. 12 is a schematic structural diagram of an embodiment of an electronic device according to the present invention.
  • FIG. 13 is a block diagram showing the circuit configuration of an embodiment of the electronic device shown in FIG.
  • a plurality includes two or more, and “a plurality of” includes two or more, unless the invention clearly dictates otherwise.
  • “At least two columns” includes various suitable situations in which two columns, three columns, four columns, and five columns are gradually increasing.
  • first and “second” appearing in each component name and signal name are not intended to limit the order in which the components or signals appear, but to facilitate the component and signal naming, to clearly distinguish the components and the signals. Make the description more concise.
  • FIG. 1 is a schematic structural diagram of a circuit of an embodiment of a biological information sensing device according to the present invention.
  • Fig. 2 is a plan view showing a part of the structure of the biological information sensing device shown in Fig. 1.
  • the biometric information sensing device 1 includes a plurality of sensing electrodes 111 and a driving circuit 20.
  • the driving circuit 20 is connected to the plurality of sensing electrodes 111 for driving the plurality of sensing electrodes 111 to perform biometric information sensing.
  • the biometric information sensing device 1 is, for example, a suitable type of sensing device such as a fingerprint sensing device or an earprint sensing device.
  • the biometric information sensing device 1 is, for example, a capacitive biometric information sensing device, and may be other suitable types of biological information sensing devices.
  • capacitive sensing devices include mutual capacitive sensing devices and self-capacitive sensing devices.
  • the biometric information sensing device 1 may be a self-capacitance biological information sensing device or a mutual capacitance biological information sensing device, depending on the cooperation relationship between the driving circuit 20 and the sensing electrode 111.
  • the mutual capacitance type biometric information sensing device may include a plurality of driving electrodes and a plurality of sensing electrodes. A mutual capacitance is formed between each of the driving electrodes and a sensing electrode.
  • the drive circuit provides an excitation signal to the drive electrode and receives a sensed signal from the sense electrode output.
  • the amount of charge formed between the driving electrode and the sensing electrode may change correspondingly, so that the sensing electrode outputs a corresponding sensing signal to Drive the circuit to obtain relevant biological information.
  • the self-capacitance bioinformation sensing device includes a plurality of sensing electrodes. Each sense electrode can form a capacitance to ground. At the time of sensing, the drive circuit provides an excitation signal to the sensing electrode and receives a sensing signal from the sensing electrode output. When the target object approaches or touches the biometric information sensing device, a capacitance is formed between the target object and the sensing electrode, causing a change in the amount of charge on the sensing electrode, so that the sensing electrode outputs a corresponding sensing signal to the driving. Circuits to obtain relevant biological information.
  • the target object is, for example, a suitable part on a human body such as a finger, a toe or an ear.
  • the present invention is not limited thereto, and the target object may be other suitable objects, and is not limited to the human body, and may be other living bodies. Even the prosthesis.
  • the biological information sensing device 1 is, for example, a self-capacitance sensing device.
  • the plurality of sensing electrodes 111 are arranged in a plurality of rows and columns. However, in other embodiments, the plurality of sensing electrodes 111 may also be arranged in other regular or irregular manners.
  • a first reference signal is provided to some or all of the remaining sensing electrodes 111. Electrode 111.
  • the driving circuit 20 provides the first reference signal to all the remaining sensing electrodes 111.
  • the driving circuit 20 supplies the excitation signal to one of the sensing electrodes 111 of each column, the first reference signal is supplied to the remaining part or all of the sensing electrodes 111, thereby applying
  • the sensing electrode 111 of the first reference signal is known to have a parasitic influence on the sensing electrode 111 performing biometric information sensing, so that the driving circuit 20 can cancel the known parasitic influence in the subsequent calculation of the biological information. , thereby improving the sensing accuracy of biological information.
  • the first reference signal is for example a constant voltage signal.
  • the voltage difference between the first reference signal and the excitation signal remains unchanged, for example, the first reference signal is the same as the excitation signal, thereby reducing the remaining sensing electrodes 111 and performing biological information
  • the sensed charge and discharge power of the parasitic capacitance between the sensing electrodes 111 further improves the sensing accuracy of the biological information.
  • the drive circuit 20 drives the sensing electrode 111 row by row to perform biometric information sensing.
  • the driving circuit 20 can simultaneously drive the plurality of rows of sensing electrodes 111 to perform biometric information sensing at a time.
  • the driving circuit 20 simultaneously provides the excitation signal to the partial sensing electrode 111 to perform biological information sensing, and provides a second reference signal to the rest. Some or all of the sensing electrodes 111 are sensed. Preferably, the second reference signal is provided to all remaining sensing electrodes 111.
  • the driving circuit 20 performs biometric information sensing on the partial sensing electrodes 111 by simultaneously supplying the excitation signals a plurality of times, thereby driving the one row of sensing electrodes 111 to perform biometric information sensing.
  • a time-division driving method for one row of sensing electrodes 111 is employed, thereby reducing the number of pins on the chip, which will be described later.
  • the driving circuit 20 can simultaneously drive the sensing electrodes 111 of one row to perform biometric information sensing.
  • the plurality of sensing electrodes 111 are formed in a display screen.
  • the driving circuit 111 is also capable of simultaneously driving one row of sensing electrodes 111 to perform biometric information sensing.
  • the driving circuit 20 provides the excitation signal to the partial sensing electrodes 111 in each row of sensing electrodes 111, the second reference signals are provided to some or all of the remaining sensing electrodes 111. 111, whereby the sensing electrode 111 to which the second reference signal is applied is known to the parasitic influence of the sensing electrode 111 performing the biological information sensing, whereby the driving circuit 20 performs subsequent calculation of the biological information. It can offset the known parasitic effects and improve the sensing accuracy of biological information.
  • the second reference signal is for example a constant voltage signal.
  • the voltage difference between the second reference signal and the excitation signal remains unchanged, for example, the second reference signal is the same as the excitation signal, thereby reducing the remaining sensing electrodes 111 and performing biological information
  • the sensed charge and discharge power of the parasitic capacitance between the sensing electrodes 111 further improves the sensing accuracy of the biological information.
  • the biometric information sensing device 1 includes a plurality of sensing units 11.
  • Each sensing unit 11 includes a sensing electrode 111, a first control switch 113, and a second control switch 115.
  • the first control switch 113 and the second control switch 115 are both connected to the sensing electrode 111.
  • the drive circuit 20 includes a scan drive circuit 21, a sense drive circuit 22, and a reference signal generation circuit 23.
  • the scan driving circuit 21 is respectively connected to the first control switch 113 and the second control switch 115 of the plurality of sensing units 11 for driving the first control switch 113 in each sensing unit 11 And the second control switch 115 is turned on in time.
  • the sensing driving circuit 22 is connected to the sensing electrode 111 through a first control switch 113 in each sensing unit 11 for providing the excitation signal to the sensing electrode 111 by the turned-on first control switch 113. Information sensing.
  • the reference signal generating circuit 23 is connected to the sensing electrode 111 through a second control switch 115 in each sensing unit 11 for providing the first reference signal to the sensing through the turned-on second control switch 115. Electrode 111.
  • the scan driving circuit 21 drives the first control switch 113 in a sensing unit 11 to be turned on, and the second control switch 115 is turned off, driving the remaining portions of the sensing unit 11 or
  • the first control switch 113 of all the sensing units 11 is turned off, the second control switch 115 is turned on, and the reference signal generating circuit 23 supplies the first reference signal to the sensing electrodes 111 through the turned-on second control switch 115.
  • the sensing driving circuit 22 provides the excitation signal to the sensing electrode 111 to perform biometric information sensing through the turned-on first control switch 113, and receives the sensing signal output from the sensing electrode 111 to acquire biometric information.
  • the sensing driving circuit 22 passes the first control switch 113 that is turned on at the same time.
  • the reference signal generating circuit 23 providing the second reference signal to a portion of the remaining sensing unit 11 through the turned-on first control switch 113 or All of the sensing electrodes 111 of the sensing unit 11.
  • the drive circuit 20 may further include a data selection circuit 24 that is connected to the sense drive circuit 22 and the reference signal generation circuit 23, respectively.
  • the data selection circuit 24 is further connected to a first control switch 113 in each of the sensing units 11. For each sensing unit 11, the data selection circuit 24 selects whether to output the second reference signal provided by the reference signal generating circuit 23 or output the excitation signal provided by the sensing driving circuit 22 to the sensing electrode. 111.
  • the data selection circuit 24 outputs the excitation signal to a sensing electrode 111, the sensing signal sensed by the sensing electrode 111 is further output to the driving circuit 20.
  • the drive circuit 20 is provided with the data selection circuit 24, it is possible to perform time-division biometric sensing on the sensing electrodes 111 of each row.
  • the data selection circuit 24 includes a plurality of data multiplexers 241.
  • Each of the data selectors 241 is connected to the partial sensing unit 11, and is further connected to the reference signal generating circuit 23 and the sensing driving circuit 22, respectively.
  • the plurality of data selectors 241 are configured to selectively output the excitation signal or the second reference signal to the sensing electrode 111.
  • each data selector 241 is coupled to at least two columns of sensing units 11.
  • the driving circuit 20 outputs the excitation signal to the sensing electrode 111 to perform biometric information sensing by using the data selector 241, and outputs the second reference signal to the same row through each data selector 241. Some or all of the remaining sensing electrodes 111 sense the electrodes 111.
  • the driving circuit 20 drives the row of sensing electrodes 111 to perform biometric information sensing by sequentially outputting the excitation signals to the sensing electrodes 111 through the data selectors 241 and the first control switches 113 that are turned on.
  • the data selection circuit 24 may be other suitable circuit configurations and is not limited to the plurality of data selectors 241 described herein.
  • the driving circuit 20 simultaneously supplies the excitation signal to the sensing electrodes 111 of each row, the data selection circuit 24 may also be omitted.
  • the drive circuit 20 can further include a control unit 30.
  • the control unit 30 is connected to the scan driving circuit 21 and the plurality of data selectors 241, respectively, for controlling the scan driving circuit 21 to drive the first control switch 113 and the second control in each row sensing unit 11.
  • control unit 30 controls the scan driving circuit 21 to turn on the first control switch 113 row by row, and control a part of the remaining rows or when the first control switch 113 of each row sensing unit 11 is turned on.
  • the second control switch 115 of the sensing unit 11 of all rows is turned on.
  • the control unit 30 controls the scan driving circuit 21 to turn on the first control switch 113 and the second control switch 115 in a time-sharing manner.
  • the control unit 30 controls the data selector 241 to time-output the excitation signal to the respective sensing units 11 connected to the data selector 241.
  • the biometric information sensing device 1 further includes, for example, a plurality of scan line groups B and a plurality of data line groups D.
  • Each scan line group B is connected to a row of sensing units 11, and each data line group D is connected to a column of sensing units 11.
  • each scan line group B includes a first scan line B1 and a second scan line B2.
  • Each data line group D includes a first data line D1 and a second data line D2.
  • the first control switch 113 includes a control electrode G1, a first transfer electrode S11, and a second transfer electrode S12.
  • the second control switch 115 includes a control electrode G2, a first transfer electrode S21, and a second transfer electrode S22.
  • the first scan line B1 is connected to the scan driving circuit 21 and the control electrode G1 of the first control switch 113.
  • the second scan line B2 is connected to the scan driving circuit 21 and the control electrode G2 of the second control switch 115.
  • the first data line D1 is connected to the data selector 241 And the first transfer electrode S11 of the first control switch 113.
  • the second data line D2 is connected to the first transmission electrode S21 of the reference signal generating circuit 23 and the second control switch 115.
  • the second transfer electrode S12 of the first control switch 113 is connected to the sensing electrode 111.
  • the second transfer electrode S22 of the second control switch 115 is connected to the sensing electrode 111.
  • the first data line D1 is for transmitting the excitation signal and the second reference signal
  • the second data line D2 is for transmitting the first reference signal
  • the scan driving circuit 21 passes the first
  • the scan line B1 and the second scan line B2 provide a scan enable signal to the first control switch 113 and the second control switch 115 to control the first control switch 113 and the second control switch 115 to be turned on, through the first scan line B1.
  • the second scan line B2 provides a scan cutoff signal to the first control switch 113 and the second control switch 115 to control the first control switch 113 and the second control switch 115 to be turned off.
  • the first scan line B1 and the second scan line B2 both extend in the row direction and are arranged in the column direction.
  • the first data line D1 and the second data line D2 both extend in the column direction and are arranged in the row direction.
  • the biometric information sensing device 1 further includes, for example, a first reference signal line R1, a second reference signal line R2, and a sensing signal line L.
  • the first reference signal line R1 is connected to the reference signal generating circuit 23 and the second data line D2 for transmitting the first reference signal.
  • the second reference signal line R2 is connected to the reference signal generating circuit 23 and the plurality of data selectors 241 for transmitting the second reference signal.
  • the sensing signal line L is connected to the sensing driving circuit 22 and the plurality of data selectors 241 for transmitting the excitation signal to the sensing electrode 111 and transmitting the sensing signal from the sensing electrode 11 to the sense The drive circuit 22 is measured.
  • the first reference signal line R1, the second reference signal line R2, and the sensing signal line L extend mainly in the row direction.
  • FIG. 3 is a schematic diagram showing the circuit structure of an embodiment of the data selector 241 shown in FIG.
  • the data selector 241 includes eight switch units 243, each of which includes a first selection switch S1 and a second selection switch S2.
  • the first selection switch S1 includes a control electrode G3, a first transfer electrode S31, and a second transfer electrode S32.
  • the second selection switch S2 includes a control electrode G4, a first transfer electrode S41, and a second transfer electrode S42.
  • the control unit 30 is connected to the control electrode G3 and the control electrode G4 in each of the switching units 243, respectively.
  • the first transfer electrode S31 is connected to the sensing drive circuit 22.
  • the first transfer electrode S41 is connected to the reference signal generating circuit 23.
  • the second transfer electrode S32 and the second transfer electrode S42 in each of the switching units 243 are connected and connected to the first transfer electrode S11 of the first control switch 113.
  • the control unit 30 controls the first selection switch S1 and the second selection switch S2 to be turned on, that is, when the first selection switch S1 is turned on, the second selection switch S2 is turned off.
  • the first selection switch S1 is turned off.
  • the control unit 30 controls the first selection switch S1 of a switching unit 243 to be turned on and the second selection switch S2 to be turned off, the first selection switch S1 of the remaining switching units 243 is controlled to be turned off, The second selection switch S2 is turned on.
  • the sensing drive circuit 22 supplies the excitation signal to the sensing electrode 111 of the sensing unit 11 that is turned on by the first control switch 113 through the first selection switch S1 that is turned on; the second selection switch S2 that is turned on
  • the reference signal generating circuit 23 supplies the second reference signal to the sensing electrode 111 of the sensing unit 11 that is turned on by the second control switch 115.
  • the number of the plurality of data selectors 241 is, for example, sixteen, and each of the data selectors 241 includes eight switching units 243.
  • the number of sensing electrodes 111 in the same row is 128.
  • FIG. 1 only shows that each data selector 241 is respectively connected to the two columns of sensing units 11, if the data selector 241 shown in FIG. Corresponding to the structure, FIG. 1 actually omits the structure in which each data selector 241 is also connected to the other six columns of sensing units 11. Further, the configuration of FIG. 4 to be described later corresponds to the configuration shown in FIG. 1, and the configuration in which each of the data selectors 241 is further connected to the other six columns of sensing units 11 is also omitted, and the description will be made here.
  • the driving circuit 20 simultaneously outputs 16 excitation signals to the 16 sensing electrodes 111 of the same row through the 16 data selectors 241, and simultaneously outputs 112 second reference signals to the same 112 sensing electrodes 111 of the row.
  • the biometric information sensing device 1 as a fingerprint sensing device as an example, when the finger of the user approaches or touches the sensing electrode 111 of the plurality of sensing units 11, the distance between the ridge and the valley and the sensing electrode 111 is Differently, therefore, the capacitances respectively formed by the ridges, valleys and the sensing electrodes 111 are different, so that the influence on the amount of charge on the sensing electrodes 111 is different, so that the driving circuit 20 can output the sensing signals according to the sensing electrodes 111. The corresponding fingerprint information can be obtained.
  • the working principle of an embodiment of the biological information sensing device 1 is as follows.
  • the control unit 30 controls the first selection switch S1 of one of the switch units 243 of each of the data selectors 241 to be turned on, the second selection switch S2 to be turned off, and controls the first of the remaining switch units 243 of the respective data selectors 241.
  • the selection switch S1 is turned off, and the second selection switch S2 is turned on.
  • the sensing driving circuit 22 supplies the excitation signal to the first data line D1 through the first selection switch S1 turned on in each of the data selectors 241.
  • the reference signal generating circuit 23 supplies the second reference signal to the first data line D1 through the second selection switch S2 that is turned on in each of the data selectors 241.
  • the first selection switch S1 of each of the switching units 243 in each of the data selectors 241 is turned on in time by a plurality of times of the control unit 30.
  • the control unit 30 controls the scan driving circuit 21 to drive the first control switch 113 to be turned on, the second control switch 115 is turned off, and the first control switch 113 that controls each row is turned on, and the second control switch 115 is turned off. At the same time, the first control switch 113 that controls the remaining rows is turned off, and the second control switch 115 is turned on. Accordingly, the excitation signal on the first data line D1 is output to the sensing electrode through the turned-on first control switch 113.
  • the reference signal generating circuit 23 supplies the first reference signal to the sensing electrode 111 through the turned-on second control switch 115.
  • the biometric information of the biometric information sensing device 1 is improved by providing the first reference signal and the second reference signal to the remaining corresponding sensing electrodes 111 when performing the biometric information sensing on each of the driving portion sensing electrodes 111. Sensing accuracy.
  • FIG. 4 is a schematic structural diagram of another embodiment of the biological information sensing device of the present invention.
  • FIG. 5 is a partial cross-sectional structural view of the biological information sensing device shown in FIG. 4.
  • FIG. Fig. 6 is a view showing a state of use of the biological information sensing device of Fig. 4;
  • the biological information sensing device 1 includes a biological information sensor 2.
  • the biometric information sensor 2 includes an insulating substrate 2a, the plurality of sensing units 11, the plurality of scanning line groups B, the plurality of data line groups D, and the first reference signal line R1.
  • the plurality of sensing units 11, the plurality of scanning line groups B, the plurality of data line groups D, and the first reference signal lines R1 are formed on the insulating substrate 2a.
  • the first control switch 113 and the second control switch 115 in each of the sensing units 11 are, for example, thin film transistor (TFT) switches, and the insulating substrate 2a is, for example, a glass substrate.
  • TFT thin film transistor
  • the biometric information sensor 2 is fabricated by a process of forming a TFT switch on a glass substrate, thereby reducing the manufacturing cost of the biometric information sensor 2 and the bioinformation sensor 2.
  • the control electrodes G1 and G2 are gates
  • the first transmission electrodes S11 and S21 are sources
  • the second transmission electrode is S12 and S22 are drains.
  • the present invention does not limit the insulating substrate 2a to a glass substrate, and may be other suitable types of insulating substrates.
  • the first control switch 113 and the second control switch 115 are not limited to thin film transistors. The switch can also be other suitable types of switches.
  • the thin film transistor switch is, for example, a suitable type of thin film transistor switch such as a low temperature polysilicon (LTPS) thin film transistor switch, an indium gallium zinc oxide (IGZO) thin film transistor switch, an amorphous silicon thin film transistor switch, or the like.
  • LTPS low temperature polysilicon
  • IGZO indium gallium zinc oxide
  • amorphous silicon thin film transistor switch or the like.
  • the thin film transistor switch is a low temperature polysilicon thin film transistor switch.
  • the insulating substrate 2a includes a first surface A1 and a second surface disposed opposite to the first surface A1 A2, the first surface A1 is configured to receive a touch or proximity input of a target object, the plurality of sensing units 11, the plurality of scan line groups B, the plurality of data line groups D, and The first reference signal line R1 is disposed on the second surface A2.
  • the sensing electrodes 111 of the plurality of sensing units 11 are compared to the first control switch 113, the second control switch 113, the plurality of scan line groups B, and the plurality of data line groups Group D is closer to the second surface A2.
  • the first control switch 113, the second control switch 115, the plurality of scan line groups B, and the plurality of data line groups D are located at the sensing electrodes 111 of the plurality of sensing units 11 The side facing away from the insulating substrate 2a.
  • the sensing electrodes 111 of the plurality of sensing units 11 cover the first control switch 113, the second control switch 115, the plurality of scan line groups B, and the plurality of data Line group D.
  • the biometric information sensor 1 further includes a passivation layer 16 disposed on the plurality of sensing units 11, the plurality of scan line groups B, the plurality of data line groups D, And the first reference signal line R1.
  • the passivation layer 16 is used to planarize the surface of the biometric information sensor 2 and to protect components such as the plurality of sensing units 11 .
  • FIG. 7 is a flowchart of a method for fabricating an embodiment of the biometric information sensor 2.
  • the method of manufacturing the biometric information sensor 2 is as follows.
  • the insulating substrate 2a is, for example, a glass substrate.
  • the sensing electrode 111 is made of, for example, a metal material. However, the sensing electrode 111 may also be made of other suitable conductive materials. For example, the sensing electrode 111 may also be made of a transparent conductive material, such as indium oxide. Tin, indium zinc oxide, and the like. In addition, the sensing electrode may also be made of an alloy material such as molybdenum, lithium or molybdenum.
  • the first insulating layer 12 is made of, for example, a material such as silicon oxide or silicon nitride.
  • F4 forming a first control switch 113 and a second control switch 115 on the first insulating layer 12, and forming a through hole H penetrating through the sensing electrode 111 on the first insulating layer 12, through the through hole a hole H, a first control switch 113 and a second control switch 115 are connected to the sensing electrode 111;
  • the first control switch 113 and the second control switch 115 of each sensing unit 11 are formed above the sensing electrodes 111 and are respectively connected to the sensing electrodes 111 through the through holes H.
  • F5 forming a passivation layer 16 on the first control switch 113 and the second control switch 115.
  • the biometric information sensor 2 is completed. It should be noted that, in the above-described manufacturing method, the steps of forming the plurality of scanning line groups B, the plurality of data line groups D, and the first reference signal line R1 are omitted.
  • the manufacturing process of the biometric information sensor 2 formed according to the above manufacturing method is simple, it is not necessary to additionally provide a protective cover or a coating layer (Coating layer), thereby saving manufacturing costs.
  • the biometric information sensor 2 may be formed by forming a first control switch 113 and a second control switch 115 of each sensing unit 11 on the insulating substrate 2a. Then, the sensing electrode 111 is formed on the first control switch 113 and the second control switch 115 of each sensing unit 11, and then, a protective cover is formed on the sensing electrode 111 or a coating layer is formed ( Coating layer). This is also possible. It should be noted that the description of the steps of the plurality of scan line groups B, the plurality of data line groups D, and the first reference signal line R1 is also omitted herein.
  • FIG. 8 is a flowchart of a method for fabricating the first control switch 113 and the second control switch 115.
  • the first control switch 113 and the second control switch 115 as amorphous silicon thin film transistors as an example, a method of manufacturing the first control switch 113 and the second control switch 115 in the process of fabricating the biological information sensor 2 will be described below.
  • the second insulating layer 13 is made of, for example, a material such as silicon oxide or silicon nitride.
  • the active layers 14, 15 are amorphous silicon layers.
  • step F4 and step F5 may be combined and implemented in the same step, but may be formed in two different steps.
  • F45 forming a first transfer electrode S11 and a second transfer electrode S12 of the first control switch 113, forming a first transfer electrode S21 and a second transfer electrode S22 of the second control switch 115 on the second insulating layer 13, and The second transfer electrode S12 and the second transfer electrode S22 are filled with the through holes H to be connected to the sensing electrodes 111, respectively.
  • the first transfer electrode S11 and the second transfer electrode S12 are located on both sides of the active layer 14, and the first transfer electrode S21 and the second transfer electrode S22 are located on both sides of the active layer 15, thereby forming The first control switch 113 and the second control switch 115.
  • the second transfer electrode S12 of the first control switch 113 and the second transfer electrode S22 of the second control switch 115 are respectively connected to the sensing electrode 111 through a through hole H.
  • the second transfer electrode S12 of the first control switch 113 and the second transfer electrode S22 of the second control switch 115 in the same sensing unit 11 can pass through the same through hole H and The sensing electrodes 111 are connected.
  • step F5 the second insulating layer 13, the first transfer electrode S11, the active layer 14, the second transfer electrode S12, the first transfer electrode S21, the active layer 15, and the second transfer electrode S22 are formed. Passivation layer 16.
  • the first control switch 113 and the second control switch 115 formed in the above manufacturing method are mainly Bottom-Gate thin film transistors. However, the first control switch 113 and the second control switch 115 may also be top.
  • a top-gate thin film transistor such as a low temperature polysilicon thin film transistor.
  • the plurality of scan line groups B, the plurality of data line groups D, the first reference signal line R1, the first control switch 113, and the second control switch 115 are connected by a connection line.
  • a peripheral wiring (not shown) formed on the second surface A2 of the insulating substrate 2a is connected by a via or the like to perform signals with a corresponding circuit of the aforementioned driving circuit 20 or a control chip 3 to be described later. transmission.
  • the biometric information sensor 2 further includes the scan driving circuit 21, the plurality of data selectors 241, the second reference signal line R2, and the sensing signal line L.
  • the scan driving circuit 21, the plurality of data selectors 241, the second reference signal line R2, and the sensing signal line L are formed on the second surface A2 of the insulating substrate 2a.
  • the scan driving circuit 21, the plurality of data selectors 241, the second reference signal line R2, and the sensing signal line L are disposed around the plurality of sensing units 11.
  • the first selection switch S1 and the second selection switch S2 of the data selector 241 are also, for example, thin film transistor switches.
  • the scan driving circuit 21 generally includes a plurality of control switches (not shown), and the plurality of control switches are, for example, thin film transistor switches.
  • the plurality of data selectors 241 and the scan driving circuit 21 are formed by the same or similar manufacturing process when the first control switch 113 and the second control switch 115 are formed, thereby improving The integration of the biometric sensor 2 and the reduction in manufacturing costs.
  • the biometric information sensing device 1 includes a control chip 3 including the control unit 30, the reference signal generating circuit 23, and the sensing driving circuit 22. That is, a part of the above-mentioned driving circuit 20 is formed in the control chip 3, and a part is formed in the raw The object information sensor 2 is provided such that the integration degree of the biological information sensing device 1 is increased, the volume of the biological information sensing device 1 is reduced, and the manufacturing cost of the biological information sensing device 1 can be reduced.
  • the biometric information sensor 2 and the control chip 3 are respectively, for example, a die, and the control chip 3 is disposed on the insulating substrate 2a, for example, by a flip chip process.
  • the control chip 3 is bonded to the glass substrate by, for example, a chip on glass (COG).
  • COG chip on glass
  • the control chip 3 is bonded to the film substrate by, for example, Chip On Film (COF).
  • COG Chip On Film
  • COF Chip On Film
  • the control chip 3 may also be formed on the insulating substrate 2a by other suitable processes, and is not limited to the flip chip process described herein.
  • the control chip 3 and the biometric information sensor 1 are placed in a mold, for example, by a molding process to form a package ( The figure is not shown) on the biometric information sensor 2 and the control chip 3, thereby forming a chip.
  • the package is made of, for example, an epoxy resin material, but is not limited to the epoxy resin material, and may be other suitable materials.
  • the packaging process may not be performed after the control chip 3 is disposed on the insulating substrate 2a of the biometric information sensor.
  • the first surface A1 of the insulating substrate 2a is used to receive a proximity or touch input of a target object, or when a user senses a living being using the biometric information sensing device 1 In the information, the first surface A1 is closer to the target object than the second surface A2.
  • the scan driving circuit 21, the data selection circuit 24, the second reference signal line R2, and the sensing signal line L may not be disposed on the insulating substrate 2a.
  • the scan driving circuit 21 and the data selection circuit 24 may be disposed in the control chip 3, or may be disposed in another chip, or may exist in a circuit other than the chip.
  • FIG. 9 is a schematic structural diagram of still another embodiment of the biological information sensing apparatus of the present invention.
  • the biometric information sensing device 1 further includes a connector 4 for connecting the control chip 3 and the biometric information sensor 2.
  • the connecting member 4 is, for example, a Flexible Printed Circuit Board (FPCB).
  • the control chip 3 is disposed, for example, on the flexible circuit board 4, and is connected to the biometric information sensor 2 via the flexible circuit board 4. Signal transmission is performed between the biometric information sensor 2 and the control chip 3 via the flexible circuit board 4.
  • FPCB Flexible Printed Circuit Board
  • the biometric information sensor 2 and the control chip 3 may also be a chip, or the biometric information sensor 2 is a die, the control chip 3 is a chip, or The biometric information sensor 2 and the control chip 3 are both dies.
  • the data selection circuit 24 is provided to control the time-division output excitation signals to the sensing electrodes 111 of the same row. Since each data selector 241 of the data selection circuit 24 is respectively provided with a port (not shown) connected to the sensing driving circuit 22, the port is used for transmitting an excitation signal or a sensing signal, correspondingly A bio-information sensor 2 is provided with a connection pin (not shown) corresponding to each port for connecting the port and the sensing drive circuit 22. In this way, the number of connection pins between the biometric information sensor 2 and the control chip 3 can be reduced.
  • the biometric information sensor 2 may be formed in a display screen or on a display screen instead of being integrated into a die or a chip.
  • the control chip 3 can simultaneously drive one row of sensing electrodes 111 to perform biometric information sensing.
  • FIG. 10 is a schematic structural diagram of another embodiment of a sensing unit according to the present invention.
  • the sensing unit 11 includes two first control switches 113 connected in parallel and two second control switches 115 connected in parallel.
  • FIG. 11 is a schematic structural diagram of still another embodiment of the biological information sensing apparatus of the present invention.
  • the driving circuit 20 and each of the sensing electrodes 111 are respectively connected by a single data line L1, and the first control switch 113 and the second control switch 115 are omitted. Accordingly, it is also feasible for the drive circuit 20 to output respective signals to the respective sensing electrodes 111.
  • FIG. 12 is a schematic structural diagram of an embodiment of an electronic device according to the present invention.
  • the electronic device 9 includes the biological information sensing device 1 according to any of the above embodiments.
  • the electronic device 9 is, for example, a portable electronic product, a home-based electronic product, or an in-vehicle electronic product.
  • the electronic device is not limited to the electronic products listed herein, but may be other suitable types of electronic products.
  • the portable electronic product is, for example, a mobile terminal, and the mobile terminal is, for example, a mobile terminal, a tablet computer, a notebook computer, a wearable product, or the like.
  • the home-based electronic product is, for example, a smart home door lock, a television, a refrigerator, a desktop computer, and the like.
  • the in-vehicle electronic products are, for example, suitable in-vehicle electronic products such as an in-vehicle display, a driving recorder, a navigator, and a car refrigerator.
  • the biological information sensing device 1 is disposed at any suitable position, such as the front side, the side surface, and the back side of the mobile phone, and the biometric information sensing device 1 can be configured as The outer casing of the mobile phone can also be placed inside the mobile phone.
  • the biometric information sensing device 1 is disposed on the front side of the mobile phone.
  • the electronic device 9 Based on the biological information sensed by the biometric information sensing device 1, the electronic device 9 performs, for example, user identity authentication, online payment, a quick launch application (APP), and the like.
  • APP quick launch application
  • the electronic device 9 includes the biological information sensing device 1, the sensing accuracy of the biological information sensing device 1 is high, and therefore, the user experience of the electronic device 9 is good.
  • FIG. 13 is a circuit block diagram of an embodiment of the electronic device shown in FIG.
  • the electronic device 9 further comprises a master chip 5.
  • the main control chip 5 is connected to the biometric information sensing device 1 for data communication with the biometric information sensing device 1.
  • the master chip 5 is, for example, a single chip or a chipset.
  • the chipset includes an application processor (AP) and a power chip. Additionally, the chipset may further include a memory chip.
  • the master chip 5 is a single chip, the master chip 5 is, for example, an application processor. Further, the application processor may also be replaced by a central processing unit (CPU).
  • CPU central processing unit
  • the main control chip 5 includes a ground terminal 50 connected to the device ground and receiving a ground signal of the device ground.
  • the ground signal is indicated by GND in FIG.
  • the device is also called system ground, for example, the negative pole of the power supply of the electronic device 9, and the power supply is a battery.
  • the ground signal GND is also referred to as a system ground voltage, a system ground signal, a device ground voltage, or a device ground signal.
  • the ground signal GND is a constant voltage.
  • the ground signal GND is, for example, a voltage signal such as 0V (volt), 2V, (-1)V.
  • the device is not earthy or absolutely earthy. However, when the electronic device 9 is connected to the earth through a conductor, the device ground may also be the earth's earth.
  • the biometric information sensing device 1 may be based on a domain as a voltage reference.
  • the domain is a domain based on the ground signal GND.
  • the ground signal GND serves as a voltage reference reference for each circuit in the biological information sensing device 1.
  • the present invention further proposes a technical aim of improving the signal to noise ratio by using a modulation technical scheme, which is applicable to the living organisms described in the above embodiments.
  • Information sensing device 1 1.
  • the signal output to the sensing unit 11 is uniformly modulated by a modulation scheme.
  • the driving circuit 20 further includes, for example, a first ground terminal 31, a second ground terminal 32, a modulation circuit 33, and a voltage generating circuit 34.
  • the modulation circuit 33 is connected between the first ground end 31 and the second ground end 32.
  • the modulation circuit 33 is further connected to the voltage generating circuit 34.
  • the first ground terminal 31 is connected to the device ground.
  • the voltage generating circuit 34 is configured to provide a voltage driving signal to the modulation circuit 33.
  • the modulation circuit 33 correspondingly generates a modulation signal MGND to the second ground terminal 32 according to the voltage driving signal and the ground signal GND on the ground of the device.
  • the modulation signal MGND is used for uniformly modulating a signal output by the driving circuit 20 to the sensing unit 11, for example, the first reference signal, the second reference signal, the excitation signal, and the scanning The turn-on signal, and the scan cutoff signal.
  • the ground where the modulation signal MGND is loaded (for example, The second ground terminal 32) is a modulated ground.
  • the excitation signal includes a first voltage signal and a second voltage signal.
  • the excitation signal is a square wave pulse signal in which the first voltage signal and the second voltage signal alternate.
  • the first voltage signal is lower than the second voltage signal, and the first voltage signal is, for example, a ground signal GND.
  • the modulation signal MGND is used to raise the second voltage signal to improve the signal to noise ratio of the sensing signal.
  • the driving circuit 20 When the driving circuit 20 receives the sensing signal from the sensing electrode 111, the sensing signal needs to be inversely modulated to acquire corresponding biological information.
  • the biometric information sensing device 1 uses two domains as a voltage reference.
  • the two fields are shown as a domain 60 referenced to the ground signal GND and a domain 70 referenced to the modulation signal MGND.
  • the ground terminal of the circuit in the domain 60 with reference to the ground signal GND is directly connected to the device ground, and the ground of the circuit in the domain 70 with reference to the modulation signal MGND is directly connected to the modulation ground.
  • the reference ground potential is a modulation signal MGND loaded by the modulation ground; and for the circuit grounded by the device ground, the reference ground potential is the ground signal GND loaded by the device ground.
  • control unit 30, the scan driving circuit 21, the data selection circuit 24, the reference signal generating circuit 23, and the sensing unit 11 are disposed, for example, in the field 70.
  • the sensing drive circuit 22 is, for example, partially located in the domain 60 and partially located in the domain 70.
  • the main control chip 5, the modulation circuit 33, and the voltage generating circuit 34 are located in the domain 60.
  • the present invention is not limited to the division of the above-mentioned circuits in the domains 60 and 70.
  • the manufacturer may perform different adjustments according to actual needs, for example, circuit conditions.
  • the biometric information sensing device 1 may further include a ground line G disposed around the plurality of sensing units 11, and in some embodiments, the grounding line G is in a grid shape,
  • the sensing electrodes 111 are located in the same layer and are disposed around the sensing electrodes 111, respectively.
  • the ground line G may be provided with a turn or the like on the periphery of the plurality of sensing units 11.
  • the biometric information sensing device 1 when the biometric information sensing device 1 is a domain with a domain as a voltage reference reference and the domain is based on the ground signal GND, the first reference signal and/or the second reference signal, for example It is a constant voltage signal with respect to the ground signal GND.
  • the biometric information sensing device 1 when the biometric information sensing device 1 is based on two domains 60 and 70 as a voltage reference, the first reference signal and/or the second reference signal is changed, for example, relative to the ground signal GND.
  • the voltage signal is a constant voltage signal with respect to the modulation signal MGND.
  • the power supply voltage signal of the modulation power supply terminal or the reference power source may be used to uniformly modulate the output of the driving circuit 20 to the plurality of sensing lists.
  • the signal of element 11 may be used to uniformly modulate the output of the driving circuit 20 to the plurality of sensing lists.

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Abstract

一种生物信息传感装置（1）和电子设备（9）。生物信息传感装置（1）包括多个感测电极（111），呈多行多列排布；驱动电路（20），与多个感测电极（111）连接，用于驱动多个感测电极（111）执行生物信息感测；对于同一列的感测电极（111）：当驱动电路（20）提供激励信号给一感测电极（111）执行生物信息感测时，提供一第一参考信号给其余感测电极（111）中的部分或全部感测电极（111）。

Description

生物信息传感装置和电子设备 技术领域
本发明涉及生物信息传感技术领域，尤其涉及一种生物信息传感装置以及具有所述生物信息传感装置的电子设备。
背景技术
目前，生物信息传感装置逐渐成为电子设备的标配，例如，越来越多的移动终端采用指纹传感装置、脸部识别传感装置、眼纹识别传感装置等等。通常，所述生物信息传感装置包括多个呈阵列式排布的感测电极以及与各感测电极相连接的驱动电路。所述驱动电路一般逐行驱动感测电极执行生物信息感测。
然，对于同一列的感测电极：当所述驱动电路提供激励信号给一感测电极，驱动所述感测电极执行生物信息感测时，所述驱动电路并不提供电压信号给其余感测电极，其余感测电极上的电压由于信号干扰等影响会存在不一致等情况，因此对在执行生物信息感测的感测电极的寄生影响不同且均是未知得，而生物信息传感装置对感测精度要求相对较高，从而不利于生物信息的准确检测。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明需要提供一种生物信息传感装置及电子设备。
本发明提供一种生物信息传感装置，包括：
多个感测电极，呈多行多列排布；
驱动电路，与所述多个感测电极连接，用于驱动所述多个感测电极执行生物信息感测；
对于同一列的感测电极：当所述驱动电路提供激励信号给一感测电极执行生物信息感测时，提供一第一参考信号给其余感测电极中的部分或全部感测电极。
可选地，所述第一参考信号与所述激励信号相同。
可选地，对于同一行的感测电极：当所述驱动电路提供激励信号给一感测电极执行生物信息感测时，提供一第二参考信号给另一感测电极。
可选地，所述第二参考信号与所述第一参考信号相同。
可选地，对于同一行的感测电极：所述驱动电路同时提供激励信号给部分感测电极执行生物信息感测，并提供所述第二参考信号给其余感测电极中的部分或全部感测电极。
可选地，对于同一行的感测电极：所述驱动电路每次同时驱动部分感测电极执行生物信息感测，通过多次驱动，直到驱动完一行感测电极执行生物信息感测。
可选地，当所述驱动电路在提供所述激励信号给感测电极时，进一步接收来自感测电极输出的感测信号，以执行自电容式的生物信息感测。
可选地，所述生物信息传感装置包括多个传感单元，所述传感单元包括：
所述感测电极；
第一控制开关，与所述感测电极连接；和
第二控制开关，与所述感测电极连接；
所述驱动电路包括：
扫描驱动电路，与所述多个传感单元中的第一控制开关和第二控制开关分别连接，用于驱动同一传感单元中的第一控制开关和第二控制开关分时导通；
感测驱动电路，通过所述第一控制开关与所述感测电极连接，用于通过导通的第一控制开关提供所述激励信号给感测电极执行生物信息感测；和
参考信号产生电路，通过所述第二控制开关与所述感测电极连接，用于通过导通的第二控制开关提供所述第一参考信号给感测电极。
可选地，对于同一列感测电极：
当所述扫描驱动电路驱动其中一传感单元中的第一控制开关导通、第二控制开关截止时，驱动其余传感单元中的部分或全部传感单元的第一控制开关截止、第二控制开关导通，所述参考信号产生电路通过导通的第二控制开关提供所述第一参考信号给感测电极。
可选地，所述感测驱动电路通过导通的第一控制开关提供所述激励信号给感测电极执行生物信息感测，并接收来自感测电极输出的感测信号，以获取生物信息。
可选地，当所述扫描驱动电路驱动一行传感单元的第一控制开关导通、第二控制开关截止时，所述感测驱动电路通过导通的第一控制开关同时提供所述激励信号给部分感测电极执行生物信息感测，所述参考信号产生电路通过导通的第一控制开关提供同一第二参考信号给其余传感单元中的部分或全部传感单元的感测电极。
可选地，所述驱动电路进一步包括多个数据选择器，所述多个数据选择器连接所述参考信号产生电路和所述感测驱动电路，每一数据选择器进一步通过第一控制开关连接部分传感单元的感测电极，所述数据选择器用于选择输出所述激励信号或所述第二参考信号给感测电极。
可选地，所述驱动电路一次同时通过各数据选择器输出所述激励信号分别给一感测电极执行生物信息感测，并通过各数据选择器分别输出所述第二参考信号给同一行的其余感测电极中的部分或全部感测电极。
可选地，所述生物信息传感装置进一步包括控制单元，所述控制单元与所述扫描驱动电路和所述多个数据选择器分别连接，用于控制所述扫描驱动电路驱动各行传感单元中的第一控制开关和第二控制开关的导通时序，以及通过控制所述多个数据选择器来控制输出所述激励信号与所述第二参考信号给感测电极的时序。
可选地，所述生物信息传感装置进一步包括：
多个扫描线群组，所述扫描线群组包括第一扫描线和第二扫描线；和
多个数据线群组，所述数据线群组包括第一数据线和第二数据线；
每一扫描线群组连接一行传感单元，每一数据线群组连接一列传感单元；
所述第一控制开关包括控制电极、第一传输电极、和第二传输电极；所述第二控制开关包括控制电极、第一传输电极、和第二传输电极；所述第一扫描线连接所述扫描驱动电路和所述第一控制开关的控制电极；所述第二扫描线连接所述扫描驱动电路和所述第二控制开关的控制电极；所述第一数据线连接所述数据选择器和第一控制开关的第一传输电极；所述第二数据线连接所述参考信号产生电路和第二控制开关的第一传输电极；所述第一控制开关的第二传输电极连接所述感测电极；所述第二控制开关的第二传输电极连接所述感测电极。
可选地，所述第一数据线用于传输所述激励信号和所述第二参考信号，所述第二数据线用于传输所述第一参考信号，所述扫描驱动电路通过所述第一扫描线、第二扫描线提供扫描开启信号给第一控制开关和第二控制开关，来控制第一控制开关和第二控制开关导通，通过所述第一扫描线、第二扫描线提供扫描截止信号给第一控制开关和第二控制开关，来控制第一控制开关和第二控制开关截止。
可选地，所述生物信息传感装置进一步包括：
第一参考信号线，连接所述参考信号产生电路和第二数据线，用于传输所述第一参考信号；
第二参考信号线，连接所述参考信号产生电路和所述多个数据选择器，用于传输所述第二参考信号；和
感测信号线，连接所述感测驱动电路和所述多个数据选择器，用于传输所述激励信号给感测电极以及传输来自感测电极的感测信号给感测驱动电路。
可选地，所述生物信息传感装置包括生物信息传感器，所述生物信息传感器包括绝缘基板、所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线，所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线形成在所述绝缘基板上。
可选地，所述各传感单元中的第一控制开关和第二控制开关均为薄膜晶体管开关，所述绝缘基板为玻璃基板。
可选地，所述传感单元包括一第一控制开关和一第二控制开关，或，所述传感单元包括并联连接的二第一控制开关和并联连接的二第二控制开关。
可选地，所述绝缘基板包括第一表面和与第一表面相对设置的第二表面，所述第一表面用于接收目标物体的触摸或接近输入，所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线设置在所述第二表面。
可选地，所述多个传感单元的感测电极相较于所述第一控制开关、所述第二控制开关、所述多个扫描线群组、和所述多个数据线群组更靠近所述第二表面。
可选地，所述第一控制开关、所述第二控制开关、所述多个扫描线群组、和所述多个数据线群组位于所述多个传感单元的感测电极背对所述绝缘基板的一侧。
可选地，所述多个传感单元的感测电极覆盖所述第一控制开关、所述第二控制开关、所述多个扫描线群组、和所述多个数据线群组。
可选地，所述生物信息传感器进一步包括所述扫描驱动电路、所述多个数据选择器、所述第二参考信号线、和所述感测信号线，所述扫描驱动电路、所述多个数据选择器、所述第二参考信号线、和所述感测信号线形成在所述绝缘基板的第二表面上。
可选地，所述扫描驱动电路、所述多个数据选择器、所述第二参考信号线、和所述感测信号线设置在所述多个传感单元的周围。
可选地，所述扫描驱动电路和所述多个数据选择器均包括控制开关，所述控制开关均为薄膜晶体管开关。
可选地，每一数据选择器包括多个开关单元，每一开关单元包括第一选择开关和第二选择开关，所述第一选择开关包括控制电极、第一传输电极、和第二传输电极，所述第二选择开关包括控制电极、第一传输电极、和第二传输电极，其中，所述第一选择开关的控制电极和第二选择开关的控制电极与所述控制单元分别连接，所述第一选择开关的第一传输电极与所述感测驱动电路连接，所述第二选择开关的第一传输电极与所述参考信号产生电路连接，所述第一选择开关的第 二传输电极和所述第二选择开关的第二传输电极相连接、并连接至第一数据线。
可选地，所述控制单元控制同一开关单元中的第一选择开关和第二选择开关分时导通。
可选地，所述生物信息传感器进一步包括钝化层，形成在所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线上。
可选地，所述生物信息传感装置进一步包括控制芯片，所述控制芯片包括所述控制单元、所述参考信号产生电路、和所述感测驱动电路。
可选地，所述生物信息传感器和所述控制芯片分别为裸片，所述控制芯片绑定在所述绝缘基板上；或者，所述控制芯片设置在一软性电路板上，通过所述软性电路板与所述生物信息传感器电连接。
可选地，所述驱动电路进一步包括调制电路，所述调制电路用于统一调制所述驱动电路输出给所述多个传感单元的信号，以提高感测信号的信噪比。
可选地，所述生物信息传感装置为自电容式的传感装置。
可选地，所述生物信息传感装置为指纹传感装置。
由于本发明的生物信息传感装置在驱动感测电极执行生物信息感测的同时，进一步提供第一参考信号给同一列的其余感测电极中的部分或全部的感测电极，从而施加有所述第一参考信号的感测电极对在执行感测的感测电极的寄生影响是可知得，相应地，所述驱动电路在获取生物信息的过程中可剔除可知的寄生影响，从而提高生物信息感测的精度。
进一步地，所述生物信息传感装置在驱动每行感测电极中的部分感测电极执行生物信息感测时，提供第二参考信号给同一行的其余感测电极中的部分或全部的感测电极，从而施加有所述第二参考信号的感测电极对在执行感测的感测电极的寄生影响是可知得，相应地，所述驱动电路在获取生物信息的过程中可剔除可知的寄生影响，从而提高生物信息感测的精度。
可选地，所述生物信息传感装置进一步包括绝缘基板、多个传感单元、保护盖板，所述多个传感单元设置在所述绝缘基板与所述保护盖板之间，所述保护盖板背对所述多个传感单元的一侧用于接收目标物体的触摸或接近输入，其中，每一传感单元包括一所述感测电极和与感测电极相连接的传感电路。
可选地，所述生物信息传感装置进一步包括绝缘基板、多个传感单元、涂覆层，所述多个传感单元设置在所述绝缘基板与所述涂覆层之间，所述涂覆层背对所述多个传感单元的一侧用于接收目标物体的触摸或接近输入，其中，每一传感单元包括一所述感测电极和与感测电极相连接的传感电路。
可选地，所述传感电路包括第一控制开关和第二控制开关，与所述感测电极均连接，其中，所述第一控制开关用于控制是否传输激励信号给感测电极，所述第二控制开关用于控制是否传输第一参考信号给感测电极，所述第一控制开关与所述第二控制开关分时导通。
本发明进一步提供一种电子设备，所述电子设备包括上述中任意一项所述的生物信息传感装置。
由于所述电子设备包括所述生物信息传感装置，因此，所述电子设备的用户体验较高。
附图说明
图1为本发明生物信息传感装置一实施方式的电路结构示意图。
图2为图1所示生物信息传感装置的部分结构的俯视图。
图3为图1所示生物信息传感装置的数据选择电路的一实施方式的电路结构示意图。
图4为本发明生物信息传感装置另一实施方式的结构示意图。
图5为图4所示生物信息传感装置的部分剖面结构示意图。
图6为图4所示生物信息传感装置的使用状态图。
图7为图3所示生物信息传感器的一实施方式的制作方法流程图。
图8为制作第一控制开关与第二控制开关的方法流程图。
图9为本发明生物信息传感装置的又一实施方式的部分结构示意图。
图10为本发明生物信息传感装置的传感单元的另一实施方式的俯视图。
图11为本发明生物信息传感装置的又一实施方式的部分结构示意图。
图12为本发明电子设备的一实施方式的结构示意图。
图13为图12所示电子设备的一实施方式的电路结构框图。
具体实施方式
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本发明将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。为了方便或清楚，可能夸大、省略或示意地示出在附图中所示的每层的厚度和大小、以及示意地示出相关元件的数量。另外，元件的大小不完全反映实际大小，以及相 关元件的数量不完全反映实际数量。因为附图大小不同等原因，在不同的附图中所示的相同或相似或相关元件的数量存在并不一致的情况。在图中相同的附图标记表示相同或类似的结构。然，需要说明的是，为了使得标号具有规律性以及逻辑性等，在某些不同实施例中，相同或类似的元件或结构采用了不同的附图标记，根据技术的关联性以及相关文字说明，本领域的技术人员是可直接或间接判断得知。
此外，所描述的特征、结构可以以任何合适的方式结合在一个或更多实施方式中。在下面的描述中，提供许多具体细节从而给出对本发明的实施方式的充分理解。然而，本领域技术人员应意识到，没有所述特定细节中的一个或更多，或者采用其它的结构、组元等，也可以实践本发明的技术方案。在其它情况下，不详细示出或描述公知结构或者操作以避免模糊本发明。
进一步地，下列术语是示例性的，并非旨在以任何方式进行限制。在阅读本申请之后，本领域技术人员将认识到，这些术语表述适用于技术、方法、物理元件以及***(无论目前是否知晓)，包括阅读本申请之后本领域技术人员推断出或者可推断的其扩展。
在本发明的描述中，需要理解的是：“多个”包括两个和两个以上，“多条”包括两条和两条以上，除非本发明另有明确具体的限定。“至少二列”包括二列、三列、四列、五列等逐渐增多的各种适合情况。另外，各元件名称以及信号名称中出现的“第一”、“第二”等词语并不是限定元件或信号出现的先后顺序，而是为方便元件以及信号命名，清楚区分各元件以及各信号，使得描述更简洁。
下面，对本发明的各实施例进行说明。
请一并参阅图1与图2，图1为本发明生物信息传感装置一实施方式的电路结构示意图。图2为图1所示生物信息传感装置的部分结构的俯视图。所述生物信息传感装置1包括多个感测电极111和驱动电路20。所述驱动电路20与所述多个感测电极111相连接，用于驱动所述多个感测电极111执行生物信息感测。所述生物信息传感装置1例如为指纹传感装置、耳纹传感装置等合适类型的传感装置。
所述生物信息传感装置1例如为电容式的生物信息传感装置，也可为其它合适类型的生物信息传感装置。
通常，电容式的传感装置包括互电容式的传感装置与自电容式的传感装置。
根据驱动电路20与感测电极111的配合关系不同，生物信息传感装置1可以是自电容式的生物信息传感装置或者是互电容式的生物信息传感装置。
在基于互电容式的生物信息传感装置中，所述互电容式的生物信息传感装置可包括多个驱动电极及多个感测电极。每一驱动电极与一感测电极之间形成互电容。在感测时，驱动电路提供激励信号给驱动电极，并接收来自感测电极输出的感测信号。当目标物体接近或触摸所述生物信息传感装置时，形成在驱动电极与感测电极之间的互电容的电荷量会有相应的变化，从而，感测电极会输出相应的感测信号给驱动电路，进而获取相关生物信息。
在基于自电容式的生物信息传感装置中，所述自电容式的生物信息传感装置包括多个感测电极。每一感测电极可形成对地的电容。在感测时，驱动电路提供激励信号给感测电极，并接收来自感测电极输出的感测信号。当目标物体接近或触摸所述生物信息传感装置时，目标物体与感测电极之间形成电容，引起感测电极上的电荷量的变化，从而，感测电极输出相应的感测信号给驱动电路，进而获取相关生物信息。
所述目标物体例如为手指、脚趾、耳朵等人体上的合适部位，但本发明并不局限于此，所述目标物体也可为其它合适的物件，并不局限于人体，也可为其它活体，甚至假体。
在本实施方式中，所述生物信息传感装置1例如为自电容式的传感装置。
所述多个感测电极111呈多行多列方式排布。然，可变更地，在其它实施方式中，所述多个感测电极111也可呈其它规则或非规则方式排布。
对于同一列的感测电极111：当所述驱动电路20提供激励信号给一感测电极111执行生物信息感测时，提供一第一参考信号给其余感测电极111中的部分或全部感测电极111。较佳地，所述驱动电路20提供所述第一参考信号给其余全部感测电极111。
由于所述驱动电路20在提供所述激励信号给各列感测电极111中的一感测电极111时，提供所述第一参考信号给其余部分或全部感测电极111，从而，施加有所述第一参考信号的感测电极111对在执行生物信息感测的感测电极111的寄生影响是可知的，从而，所述驱动电路20在后续对生物信息的计算时可抵消可知的寄生影响，进而提高生物信息的感测精度。
所述第一参考信号例如为恒定的电压信号。
或者，所述第一参考信号与所述激励信号之间的压差保持不变，例如，所述第一参考信号与所述激励信号相同，从而减小其余感测电极111与在执行生物信息感测的感测电极111之间的寄生电容的充放电电量，进一步提高生物信息的感测精度。
在本实施方式中，所述驱动电路20逐行驱动感测电极111执行生物信息感测。然，可变更地，在其它实施方式中，所述驱动电路20也可一次同时驱动多行感测电极111执行生物信息感测。
进一步地，在本实施方式中，对于同一行的感测电极111：所述驱动电路20同时提供所述激励信号给部分感测电极111执行生物信息感测，并提供一第二参考信号给其余感测电极111中的部分或全部感测电极111。较佳地，提供所述第二参考信号给其余全部感测电极111。
对于同一行的感测电极111：所述驱动电路20通过先后多次同时提供所述激励信号给部分感测电极111执行生物信息感测，从而驱动完一行感测电极111执行生物信息感测。
当所述多个感测电极111形成在一芯片上时，采用对一行感测电极111的分时驱动方式，从而可减少所述芯片上的引脚数量，对此，后面会有相关叙述。
然，可变更地，在其它实施方式中，所述驱动电路20也可同时驱动一行的感测电极111均执行生物信息感测。例如，所述多个感测电极111是形成在显示屏中。当所述多个感测电极111设置在芯片上时，所述驱动电路也是可同时驱动一行的感测电极111均执行生物信息感测。
另外，由于所述驱动电路20在提供所述激励信号给各行感测电极111中的部分感测电极111时，提供所述第二参考信号给其余感测电极111中的部分或全部感测电极111，从而，施加有所述第二参考信号的感测电极111对在执行生物信息感测的感测电极111的寄生影响是可知的，从而，所述驱动电路20在后续对生物信息的计算时可抵消可知的寄生影响，进而提高生物信息的感测精度。
所述第二参考信号例如为恒定的电压信号。
或者，所述第二参考信号与所述激励信号之间的压差保持不变，例如，所述第二参考信号与所述激励信号相同，从而减小其余感测电极111与在执行生物信息感测的感测电极111之间的寄生电容的充放电电量，进一步提高生物信息的感测精度。
在一些具体实施方式中，所述生物信息传感装置1包括多个传感单元11。每一传感单元11包括一所述感测电极111、第一控制开关113、和第二控制开关115。所述第一控制开关113、所述第二控制开关115均与所述感测电极111连接。
所述驱动电路20包括扫描驱动电路21、感测驱动电路22、和参考信号产生电路23。所述扫描驱动电路21与所述多个传感单元11中的第一控制开关113和第二控制开关115分别连接，用于驱动每一传感单元11中的第一控制开关113 和第二控制开关115分时导通。所述感测驱动电路22通过各传感单元11中的第一控制开关113与感测电极111连接，用于通过导通的第一控制开关113提供所述激励信号给感测电极111执行生物信息感测。所述参考信号产生电路23通过各传感单元11中的第二控制开关115与所述感测电极111连接，用于通过导通的第二控制开关115提供所述第一参考信号给感测电极111。
对于同一列的感测电极111：当所述扫描驱动电路21驱动一传感单元11中的第一控制开关113导通、第二控制开关115截止时，驱动其余传感单元11中的部分或全部传感单元11的第一控制开关113截止、第二控制开关115导通，所述参考信号产生电路23通过导通的第二控制开关115提供所述第一参考信号给感测电极111。
所述感测驱动电路22通过导通的第一控制开关113提供所述激励信号给感测电极111执行生物信息感测，并接收来自感测电极111输出的感测信号，以获取生物信息。
进一步地，当所述扫描驱动电路21驱动一行传感单元11的第一控制开关113导通、第二控制开关115截止时，所述感测驱动电路22通过导通的第一控制开关113同时提供所述激励信号给部分感测电极111执行生物信息感测，所述参考信号产生电路23通过导通的第一控制开关113提供所述第二参考信号给其余传感单元11中的部分或全部传感单元11的感测电极111。
在本实施方式中，所述驱动电路20可进一步包括数据选择电路24，所述数据选择电路24与所述感测驱动电路22和所述参考信号产生电路23分别连接。所述数据选择电路24进一步与各传感单元11中的第一控制开关113连接。对于各传感单元11，通过所述数据选择电路24来选择是输出所述参考信号产生电路23所提供的第二参考信号还是输出所述感测驱动电路22所提供的激励信号给感测电极111。当所述数据选择电路24输出所述激励信号给一感测电极111时，进一步输出所述感测电极111所感测的感测信号给所述驱动电路20。
由于所述驱动电路20设置有所述数据选择电路24，从而可以实现对各行的感测电极111进行分时执行生物信息感测。
在一实施方式中，所述数据选择电路24包括多个数据选择器(Multiplexer)241。每一数据选择器241连接部分传感单元11，且进一步与所述参考信号产生电路23和所述感测驱动电路22分别连接。所述多个数据选择器241用于选择输出所述激励信号或所述第二参考信号给感测电极111。可选地，每一数据选择器241连接至少二列传感单元11。
所述驱动电路20一次同时通过各数据选择器241分别输出所述激励信号给一感测电极111执行生物信息感测，并通过各数据选择器241分别输出所述第二参考信号给同一行的其余感测电极111中的部分或全部感测电极111。
所述驱动电路20通过先后多次同时通过各数据选择器241以及导通的第一控制开关113输出所述激励信号给感测电极111，来驱动完一行感测电极111执行生物信息感测。
可变更地，在其它实施方式中，所述数据选择电路24也可为其它的合适的电路结构，并不局限于此处所述的多个数据选择器241。另外，当所述驱动电路20同时提供所述激励信号给每行的感测电极111时，所述数据选择电路24也可是省略的。
所述驱动电路20可进一步包括控制单元30。所述控制单元30与所述扫描驱动电路21和所述多个数据选择器241分别连接，用于控制所述扫描驱动电路21驱动各行传感单元11中的第一控制开关113和第二控制开关115的导通时序，以及通过控制所述多个数据选择器241来控制输出所述激励信号与所述第二参考信号给感测电极111的时序。
例如，所述控制单元30控制所述扫描驱动电路21逐行导通第一控制开关113，并在控制各行传感单元11的第一控制开关113导通时，控制其余行中的部分行或全部行的传感单元11的第二控制开关115导通。对于同一传感单元11：所述控制单元30控制所述扫描驱动电路21分时导通第一控制开关113和第二控制开关115。
所述控制单元30控制所述数据选择器241分时输出所述激励信号给与所述数据选择器241相连接的各传感单元11。
在一些实施方式中，所述生物信息传感装置1例如进一步包括多个扫描线群组B和多个数据线群组D。每一扫描线群组B连接一行传感单元11，每一数据线群组D连接一列传感单元11。
具体地，每一扫描线群组B包括第一扫描线B1和第二扫描线B2。每一数据线群组D包括第一数据线D1和第二数据线D2。
所述第一控制开关113包括控制电极G1、第一传输电极S11、和第二传输电极S12。所述第二控制开关115包括控制电极G2、第一传输电极S21、和第二传输电极S22。所述第一扫描线B1连接所述扫描驱动电路21和所述第一控制开关113的控制电极G1。所述第二扫描线B2连接所述扫描驱动电路21和所述第二控制开关115的控制电极G2。所述第一数据线D1连接所述数据选择器241 和第一控制开关113的第一传输电极S11。所述第二数据线D2连接所述参考信号产生电路23和第二控制开关115的第一传输电极S21。所述第一控制开关113的第二传输电极S12连接所述感测电极111。所述第二控制开关115的第二传输电极S22连接所述感测电极111。
所述第一数据线D1用于传输所述激励信号和所述第二参考信号，所述第二数据线D2用于传输所述第一参考信号，所述扫描驱动电路21通过所述第一扫描线B1、第二扫描线B2提供扫描开启信号给第一控制开关113和第二控制开关115，来控制第一控制开关113和第二控制开关115导通，通过所述第一扫描线B1、第二扫描线B2提供扫描截止信号给第一控制开关113和第二控制开关115，来控制第一控制开关113和第二控制开115关截止。
所述第一扫描线B1和第二扫描线B2均沿行方向延伸、沿列方向排列。所述第一数据线D1和所述第二数据线D2均沿列方向延伸、沿行方向排列。
在一些实施方式中，所述生物信息传感装置1例如进一步包括第一参考信号线R1、第二参考信号线R2、和感测信号线L。所述第一参考信号线R1连接所述参考信号产生电路23和第二数据线D2，用于传输所述第一参考信号。所述第二参考信号线R2连接所述参考信号产生电路23和所述多个数据选择器241，用于传输所述第二参考信号。所述感测信号线L连接所述感测驱动电路22和所述多个数据选择器241，用于传输所述激励信号给感测电极111以及传输来自感测电极11的感测信号给感测驱动电路22。
所述第一参考信号线R1、第二参考信号线R2、和感测信号线L主要沿行方向延伸。
请参阅图3，图3为本发明图1所示的数据选择器241的一实施例的电路结构示意图。所述数据选择器241包括8个开关单元243，每个开关单元243包括一第一选择开关S1和一第二选择开关S2。所述第一选择开关S1包括控制电极G3、第一传输电极S31、和第二传输电极S32。所述第二选择开关S2包括控制电极G4、第一传输电极S41、和第二传输电极S42。所述控制单元30与各个开关单元243中的控制电极G3和控制电极G4分别连接。所述第一传输电极S31与所述感测驱动电路22连接。所述第一传输电极S41与所述参考信号产生电路23连接。每一个开关单元243中的第二传输电极S32和第二传输电极S42相连接，并连接至第一控制开关113的第一传输电极S11。
对于同一开关单元243：所述控制单元30控制所述第一选择开关S1和第二选择开关S2分时导通，即，当第一选择开关S1导通时，第二选择开关S2截止， 当第二选择开关S2导通时，第一选择开关S1截止。对于同一数据选择器241：当所述控制单元30控制一开关单元243中的第一选择开关S1导通、第二选择开关S2截止时，控制其余开关单元243中的第一选择开关S1截止、第二选择开关S2导通。通过导通的第一选择开关S1，所述感测驱动电路22提供所述激励信号至第一控制开关113导通的传感单元11的感测电极111；通过导通的第二选择开关S2，所述参考信号产生电路23提供所述第二参考信号至第二控制开关115导通的传感单元11的感测电极111。
在本实施方式中，所述多个数据选择器241的数量例如为16个，每一数据选择器241包括8个开关单元243。对应地，同一行的感测电极111的数量为128个。
需要说明的是，在图1中，受限于附图的大小，图1只示出每一数据选择器241分别与二列传感单元11连接，若与图3所示的数据选择器241的结构相对应，图1实际上省略了每一数据选择器241还与另外六列传感单元11相连接的结构。另外，后述的图4的结构与图1所示的结构相对应，同样省略了每一数据选择器241还与另外六列传感单元11相连接的结构，在此一并做出说明。
相应地，所述驱动电路20例如每次通过所述16个数据选择器241同时输出16个激励信号对应给同一行的16个感测电极111，并同时输出112个第二参考信号对应给同一行的112个感测电极111。
以所述生物信息传感装置1为指纹传感装置为例，当用户的手指接近或触摸所述多个传感单元11的感测电极111时，由于脊、谷与感测电极111的距离不同，因此，脊、谷与感测电极111所分别形成的电容对应不同，从而对感测电极111上的电荷量的影响就不同，从而驱动电路20可以根据感测电极111输出的感测信号可以获知相应的指纹信息。
所述生物信息传感装置1一实施方式的工作原理如下。
所述控制单元30控制各数据选择器241中的一开关单元243中的第一选择开关S1导通、第二选择开关S2截止，控制各数据选择器241中的其余开关单元243中的第一选择开关S1截止，第二选择开关S2导通，相应地，所述感测驱动电路22通过各数据选择器241中导通的第一选择开关S1提供所述激励信号至第一数据线D1上，所述参考信号产生电路23通过各数据选择器241中导通的第二选择开关S2提供所述第二参考信号至第一数据线D1上。通过所述控制单元30的多次控制，所述各数据选择器241中的各开关单元243中的第一选择开关S1分时导通。
所述控制单元30控制所述扫描驱动电路21逐行驱动第一控制开关113导通、第二控制开关115截止，并在分别控制各行的第一控制开关113导通、第二控制开关115截止的同时，控制其余行的第一控制开关113截止、第二控制开关115导通，相应地，所述第一数据线D1上的激励信号通过导通的第一控制开关113输出给感测电极111，并接收来自感测电极111输出的感测信号，以执行生物信息感测，所述第一数据线D1上的第二参考信号通过导通的第一控制开关113输出给感测电极111，另外，所述参考信号产生电路23通过导通的第二控制开关115提供所述第一参考信号到感测电极111。
通过在各次驱动部分感测电极111执行生物信息感测时，提供第一参考信号与第二参考信号给其余相应的感测电极111，来提高所述生物信息感测装置1的生物信息的感测精度。
请一并参阅图1、图4至图6，图4为本发明生物信息传感装置的另一实施方式的结构示意图。图5为图4所示生物信息传感装置的部分剖面结构示意图。图6为图4所述生物信息传感装置的使用状态图。所述生物信息传感装置1包括生物信息传感器2。所述生物信息传感器2包括绝缘基板2a、所述多个传感单元11、所述多个扫描线群组B、所述多个数据线群组D、和所述第一参考信号线R1。所述多个传感单元11、所述多个扫描线群组B、所述多个数据线群组D、和所述第一参考信号线R1形成在所述绝缘基板2a上。
在本实施方式中，所述各传感单元11中的第一控制开关113和第二控制开关115例如均为薄膜晶体管(Thin Film Transistor,TFT)开关，所述绝缘基板2a例如为玻璃基板，从而，采用玻璃基板上形成TFT开关的工艺来制作所述生物信息传感器2，进而降低生物信息传感器2以及包括所述生物信息传感器2的生产制造成本。当所述第一控制开关113、第二控制开关115为薄膜晶体管开关时，所述控制电极G1、G2为栅极，所述第一传输电极S11、S21为源极，所述第二传输电极S12、S22为漏极。
然，本发明并不限制所述绝缘基板2a为玻璃基板，也可为其它合适类型的绝缘基板，同样，也不限制所述第一控制开关113和所述第二控制开关115均为薄膜晶体管开关，也可为其它合适类型的开关。
所述薄膜晶体管开关例如为低温多晶硅(LTPS)薄膜晶体管开关、氧化铟镓锌(IGZO)薄膜晶体管开关、非晶硅薄膜晶体管开关等合适类型的薄膜晶体管开关。较佳地，所述薄膜晶体管开关为低温多晶硅薄膜晶体管开关。
所述绝缘基板2a包括第一表面A1和与第一表面A1相对设置的第二表面 A2，所述第一表面A1用于接收目标物体的触摸或接近输入，所述多个传感单元11、所述多个扫描线群组B、所述多个数据线群组D、和所述第一参考信号线R1设置在所述第二表面A2。
所述多个传感单元11的感测电极111相较于所述第一控制开关113、所述第二控制开关113、所述多个扫描线群组B、和所述多个数据线群D组更靠近所述第二表面A2。
所述第一控制开关113、所述第二控制开关115、所述多个扫描线群组B、和所述多个数据线群组D位于所述多个传感单元11的感测电极111背对所述绝缘基板2a的一侧。
较佳地，所述多个传感单元11的感测电极111覆盖所述第一控制开关113、所述第二控制开关115、所述多个扫描线群组B、和所述多个数据线群组D。
所述生物信息传感器1进一步包括钝化层16，所述钝化层16设置在所述多个传感单元11、所述多个扫描线群组B、所述多个数据线群组D、和所述第一参考信号线R1上。
所述钝化层16用于平坦化所述生物信息传感器2的表面，以及对所述多个传感单元11等元件进行保护。
请一并参阅图5和图7，图7为生物信息传感器2的一实施方式的制作方法流程图。所述生物信息传感器2的制作方法如下。
F1：提供一绝缘基板2a；
所述绝缘基板2a例如为玻璃基板。
F2：在所述绝缘基板2a上形成所述多个感测电极111；
所述感测电极111例如由金属材料制成。然，可变更地，所述感测电极111也可为有其它合适的导电材料制成，例如，所述感测电极111也可由透明的导电材料制成，所述透明导电材料例如为氧化铟锡、氧化铟锌等等。另外，所述感测电极也可由钼锂钼等合金材料制成。
F3：于所述多个感测电极111上形成第一绝缘层12；
所述第一绝缘层12例如为氧化硅、氮化硅等材料制成。
F4：于所述第一绝缘层12上形成第一控制开关113和第二控制开关115，并于所述第一绝缘层12上形成贯穿至感测电极111的通孔H，通过所述通孔H，第一控制开关113和第二控制开关115与感测电极111连接；
每一传感单元11的第一控制开关113和第二控制开关115形成在感测电极111上方，且分别通过通孔H与感测电极111相连接。
F5：于所述第一控制开关113和所述第二控制开关115上形成钝化层16。
所述生物信息传感器2制作完毕。需要说明的是，在上述的制作方法中，省略形成所述多个扫描线群组B、多个数据线群组D、和第一参考信号线R1的步骤。
由于按照上述制作方法形成的生物信息传感器2的制作工艺简单，无需再额外设置一保护盖板或形成涂覆层(Coating层)，从而可节省制造成本。
然，可变更地，在其它实施方式中，所述生物信息传感器2的制作方法也可为：在所述绝缘基板2a上形成各传感单元11的第一控制开关113和第二控制开关115，然后在各传感单元11的所述第一控制开关113和所述第二控制开关115上形成感测电极111，接下来，在感测电极111上设置保护盖板或者形成涂覆层(Coating层)。如此，也是可以的。需要说明的是，此处也省略了对所述多个扫描线群组B、多个数据线群组D、和第一参考信号线R1的步骤的描述。
下面继续参阅图5，并请一并参阅图8，图8为制作第一控制开关113与第二控制开关115的方法流程图。以第一控制开关113和第二控制开关115为非晶硅薄膜晶体管为例，对在制作生物信息传感器2的过程中形成第一控制开关113和第二控制开关115的制造方法进行说明如下。
F41：于所述第一绝缘层12上形成第一控制开关113的控制电极G1和第二控制开关115的控制电极G2；
F42：于所述第一绝缘层12、所述控制电极G1、G2上形成第二绝缘层13；
所述第二绝缘层13例如为氧化硅、氮化硅等材料制成。
F43：于所述第二绝缘层13上形成有源层14、15；
所述有源层14、15为非晶硅层。
F44：于所述第二绝缘层13和所述第一绝缘层12上形成贯穿至所述感测电极111的通孔H；
需要说明的是，步骤F4与步骤F5可合并在同一步骤实现，然，也可为在二个不同的步骤中形成。
F45：于所述第二绝缘层13上形成第一控制开关113的第一传输电极S11和第二传输电极S12、形成第二控制开关115的第一传输电极S21和第二传输电极S22，且所述第二传输电极S12和第二传输电极S22充满所述通孔H，以分别连接所述感测电极111连接。
所述第一传输电极S11和第二传输电极S12位于所述有源层14的两侧，所述第一传输电极S21和第二传输电极S22位于所述有源层15的两侧，从而形成 所述第一控制开关113和所述第二控制开关115。
在本实施方式中，所述第一控制开关113的第二传输电极S12和所述第二控制开关115的第二传输电极S22分别通过一通孔H与所述感测电极111连接。然，在其它实施方式中，同一传感单元11中的所述第一控制开关113的第二传输电极S12和所述第二控制开关115的第二传输电极S22可通过同一通孔H与所述感测电极111连接。
步骤F5中：于所述第二绝缘层13、第一传输电极S11、有源层14、第二传输电极S12、第一传输电极S21、有源层15、第二传输电极S22上形成所述钝化层16。
上述制作方法中形成的第一控制开关113与第二控制开关115主要是底栅型(Bottom-Gate)的薄膜晶体管，然，所述第一控制开关113与第二控制开关115也可为顶栅型(Top-Gate)的薄膜晶体管，例如低温多晶硅薄膜晶体管。
需要进一步说明的是，所述多个扫描线群组B、多个数据线群组D、第一参考信号线R1、所述第一控制开关113、所述第二控制开关115的连接走线最后例如通过过孔等方式与所述绝缘基板2a的第二表面A2上形成的周围布线(未标示)相连接，以与前述的驱动电路20或后述的控制芯片3中相应的电路进行信号传输。
可选地，所述生物信息传感器2进一步包括所述扫描驱动电路21、所述多个数据选择器241、所述第二参考信号线R2、和所述感测信号线L。所述扫描驱动电路21、所述多个数据选择器241、所述第二参考信号线R2、和所述感测信号线L形成在所述绝缘基板2a的第二表面A2上。
所述扫描驱动电路21、所述多个数据选择器241、所述第二参考信号线R2、和所述感测信号线L设置在所述多个传感单元11的周围。
所述数据选择器241的第一选择开关S1和第二选择开关S2例如也均为薄膜晶体管开关。所述扫描驱动电路21一般包括多个控制开关(图未示)，且所述多个控制开关例如为薄膜晶体管开关。相应地，所述多个数据选择器241和所述扫描驱动电路21在所述第一控制开关113和所述第二控制开关115形成时，通过相同或相似的制作工艺一并形成，从而提高生物信息传感器2的集成度，并降低制作成本。
在一些实施方式中，所述生物信息传感装置1包括控制芯片3，所述控制芯片3包括所述控制单元30、所述参考信号产生电路23、和所述感测驱动电路22。即，前述的驱动电路20中的一部分电路形成在控制芯片3中，一部分形成在生 物信息传感器2上，如此设置，一方面提高生物信息传感装置1的集成度，减小所述生物信息传感装置1的体积，另外，也可降低生物信息传感装置1的制造成本。
可选地，所述生物信息传感器2和所述控制芯片3例如分别为裸片(Die)，所述控制芯片3例如通过覆晶工艺(Flip-Chip)设置在所述绝缘基板2a上。当所述绝缘基板2a例如为玻璃基板时，所述控制芯片3例如通过玻璃上芯片(Chip On Glass,COG)的方式绑定(Bonding)在所述玻璃基板上。当所述绝缘基板2a例如为薄膜基板时，所述控制芯片3例如通过薄膜上芯片(Chip On Film,COF)的方式绑定在所述薄膜基板上。然，所述控制芯片3也可采用其它合适的工艺形成在所述绝缘基板2a上，并不限制为此处所述的覆晶工艺。
当所述控制芯片3设置在所述生物信息传感器的绝缘基板2a上之后，再将所述控制芯片3与所述生物信息传感器1放置在模具中，例如通过注塑(Molding)工艺形成封装体(图未示)在所述生物信息传感器2和所述控制芯片3上，从而形成为一芯片(Chip)。所述封装体例如为环氧树脂材料制成，但不局限于所述环氧树脂材料，也可为其它合适的材料。然，可变更地，当所述控制芯片3设置在所述生物信息传感器的绝缘基板2a上之后，也可不进行封装工艺。
当所述生物信息传感装置1形成后，所述绝缘基板2a的第一表面A1用于接收目标物体的接近或触摸输入，或者说，当用户使用所述生物信息传感装置1感测生物信息时，所述第一表面A1相较于所述第二表面A2更邻近目标物体。
在其它实施方式中，所述扫描驱动电路21、所述数据选择电路24、所述第二参考信号线R2、和所述感测信号线L也可非设置在所述绝缘基板2a上。例如所述扫描驱动电路21和所述数据选择电路24也可设置在所述控制芯片3中，或者，设置在另外的芯片中，又或者，以芯片之外的电路方式存在也是可以的。
请参阅图9，图9为本发明生物信息传感装置的又一实施例的结构示意图。所述生物信息传感装置1进一步包括连接件4，所述连接件4用于连接所述控制芯片3与所述生物信息传感器2。所述连接件4例如为软性电路板(Flexible Printed Circuit Board,FPCB)。所述控制芯片3例如设置在所述软性电路板4上，并通过所述软性电路板4与所述生物信息传感器2连接。通过所述软性电路板4，在所述生物信息传感器2与所述控制芯片3之间进行信号传输。
在此实施方式中，所述生物信息传感器2和所述控制芯片3也可均为一芯片(Chip)，或者，所述生物信息传感器2为裸片，所述控制芯片3为芯片，或者，所述生物信息传感器2和所述控制芯片3均为裸片。
在上述各实施方式中，所述生物信息传感器2为裸片或芯片时，通过设置所述数据选择电路24来对应控制分时输出激励信号给同一行的感测电极111。由于所述数据选择电路24的每一数据选择器241分别设置与所述感测驱动电路22相连接的一端口(图未示)，所述端口用于传输激励信号或感测信号，相应地，所述生物信息传感器2上对应每个端口设置一连接引脚(图未示)，用以连接所述端口与所述感测驱动电路22。如此，可以减少生物信息传感器2与控制芯片3之间的连接引脚的数量。
可变更地，在其它实施方式中，例如，所述生物信息传感器2也可为形成在显示屏中或显示屏上，而并非集成为一裸片或一芯片。当所述生物信息传感器2形成在显示屏中或显示屏上时，所述控制芯片3可同时驱动一行感测电极111执行生物信息感测。
请参阅图10，图10为本发明传感单元的另一实施例的结构示意图。所述传感单元11包括并联连接的二第一控制开关113和并联连接的二第二控制开关115。
请参阅图11，图11为本发明生物信息传感装置的又一实施方式的结构示意图。所述驱动电路20与各感测电极111之间分别通过一单独的数据线L1连接，省略第一控制开关113和第二控制开关115。相应地，所述驱动电路20通过分别输出相应的信号给各感测电极111也是可行的。
请参阅图12，图12为本发明电子设备的一实施方式的结构示意图。所述电子设备9包括上述任一实施方式所述的生物信息传感装置1。所述电子设备9例如为可携式电子产品、家居式电子产品、或车载电子产品。然而，所述电子设备不局限此处所列的电子产品，还可以是其它合适类型的电子产品。所述可携式电子产品例如为移动终端，所述移动终端例如为手机、平板电脑、笔记本电脑、穿戴式产品等合适的移动终端。所述家居式电子产品例如为智能门锁、电视、冰箱、台式电脑等合适的家居式电子产品。所述车载电子产品例如为车载显示器、行车记录仪、导航仪、车载冰箱等合适的车载电子产品。
以所述电子设备9为手机为例，所述生物信息传感装置1例如设置在所述手机的正面、侧面、背面等任意合适的位置，另外，所述生物信息传感装置1可设置为曝露出手机的外壳，也可设置在手机的内部。在此实施方式中，所述生物信息传感装置1设置在手机的正面。
根据所述生物信息传感装置1所感测到的生物信息，所述电子设备9例如进行用户身份鉴权、在线支付、快速启动应用程序(APP)等等。
由于所述电子设备9包括所述生物信息传感装置1，所述生物信息传感装置1的感测精度较高，因此，所述电子设备9的用户体验较好。
请参阅图13，图13为图12所示电子设备一实施方式的电路方框图。所述电子设备9进一步包括主控芯片5。所述主控芯片5与所述生物信息传感装置1连接，用于与生物信息传感装置1进行数据通信。所述主控芯片5例如为单一芯片或芯片组。当主控芯片5为芯片组时，所述芯片组包括应用处理器(Application Processor,AP)和电源芯片。另外，所述芯片组可进一步包括存储芯片。当主控芯片5为单一芯片时，所述主控芯片5例如为应用处理器。进一步地，所述应用处理器也可替换为中央处理器(Central Processing Unit,CPU)。
所述主控芯片5包括接地端50，所述接地端50连接设备地，接收设备地的接地信号，接地信号在图9以GND表示。所述设备地又称***地，例如为电子设备9的供电电源的负极，供电电源如为电池。所述接地信号GND又称***地电压、***地信号、设备地电压、或设备地信号等。所述接地信号GND为恒定电压，作为电子设备9中各电路的电压参考基准，所述接地信号GND例如为0V(伏)、2V、(-1)V等电压信号。通常，所述设备地并非地球大地或绝对大地。然，当电子设备9通过导体与地球大地连接时，所述设备地也可能为地球大地。
在前述的各实施方式中，所述生物信息传感装置1可是以一个域为电压参考基准。所述域是以接地信号GND为基准的域。所述接地信号GND作为生物信息传感装置1中各电路的电压参考基准。
为提高生物信息传感装置1的感测信号的信噪比，本发明进一步提出利用调制技术方案来达到提高信噪比的技术目的，所述调制技术方案适用于上述各实施方式所述的生物信息传感装置1。
例如，通过调制地的技术方案来达到统一调制输出给传感单元11的信号。
具体地，所述驱动电路20例如进一步包括第一接地端31、第二接地端32、调制电路33、和电压产生电路34。所述调制电路33连接于所述第一接地端31和所述第二接地端32之间。所述调制电路33进一步与所述电压产生电路34相连接。所述第一接地端31连接至设备地。所述电压产生电路34用于提供一电压驱动信号给所述调制电路33。所述调制电路33根据所述电压驱动信号和所述设备地上的接地信号GND来对应产生调制信号MGND给所述第二接地端32。所述调制信号MGND用于统一调制所述驱动电路20输出给所述传感单元11上的信号，例如，所述第一参考信号、所述第二参考信号、所述激励信号、所述扫描开启信号、和所述扫描截止信号。其中，加载所述调制信号MGND的地(例如， 第二接地端32)为调制地。
例如，所述激励信号包括第一电压信号与第二电压信号。所述激励信号为第一电压信号和第二电压信号交替变化的方波脉冲信号。其中，所述第一电压信号低于所述第二电压信号，所述第一电压信号例如为接地信号GND。所述调制信号MGND用于抬高所述第二电压信号，以提高感测信号的信噪比。
当所述驱动电路20接收到来自感测电极111输出的感测信号时，需要对感测信号进行反向调制，来获取相应的生物信息。
在此实施方式中，所述生物信息传感装置1是以两个域为电压参考基准。两个域分别示出为以接地信号GND为基准的域60和以调制信号MGND为基准的域70。其中，在以接地信号GND为基准的域60中的电路的接地端均直接连接设备地，在以调制信号MGND为基准的域70中的电路的接地端均直接连接调制地。进一步地，对于以调制地为地的电路，其参考地电位为调制地所加载的调制信号MGND；对于以设备地为地的电路，其参考地电位为设备地所加载的接地信号GND。
在本实施方式中，所述控制单元30、所述扫描驱动电路21、所述数据选择电路24、所述参考信号产生电路23、以及传感单元11例如设置在域70中。所述感测驱动电路22例如一部分位于域60中，一部分位于域70中。所述主控芯片5、所述调制电路33、所述电压产生电路34位于域60中。
然，可变更地，本发明并不局限上述电路在域60、70中的划分，厂商可根据实际需要，例如电路情况不同，对应做不同调整等。
所述生物信息传感装置1可进一步包括接地线G，所述接地线G围绕所述多个传感单元11设置，在一些实施方式中，所述接地线G为网格状，与所述感测电极111位于同一层，分别围绕所述感测电极111设置。可变更地，所述接地线G也可为在所述多个传感单元11的***设置一圈等等也是可以的。
另外，当所述生物信息传感装置1是以一个域为电压参考基准、所述域是以接地信号GND为基准的域时，所述第一参考信号和/或所述第二参考信号例如为相对所述接地信号GND为恒定的电压信号。然，当所述生物信息传感装置1是以两个域60和70为电压参考基准时，所述第一参考信号和/或所述第二参考信号例如为相对所述接地信号GND为变化的电压信号，相对所述调制信号MGND为恒定的电压信号。
更进一步地，除了上述通过采用调制地的技术方案，也可采用调制电源端或参考电源的电源电压信号，来统一调制所述驱动电路20输出给所述多个传感单 元11的信号。
虽然实施方式这里已经关于具体的配置和操作序列进行描述，但是应该理解，替代的实施方式可增加、省略或改变元件、操作等等。因此，这里公开的实施方式意味着是实施例而不是限制。

Claims (39)

  1. 一种生物信息传感装置，包括：
    多个感测电极，呈多行多列排布；
    驱动电路，与所述多个感测电极连接，用于驱动所述多个感测电极执行生物信息感测；
    对于同一列的感测电极：当所述驱动电路提供激励信号给一感测电极执行生物信息感测时，提供一第一参考信号给其余感测电极中的部分或全部感测电极。
  2. 根据权利要求1所述的生物信息传感装置，其特征在于：所述第一参考信号与所述激励信号相同。
  3. 根据权利要求1所述的生物信息传感装置，其特征在于：对于同一行的感测电极：当所述驱动电路提供激励信号给一感测电极执行生物信息感测时，提供一第二参考信号给另一感测电极。
  4. 根据权利要求3所述的生物信息传感装置，其特征在于：所述第二参考信号与所述第一参考信号相同。
  5. 根据权利要求3所述的生物信息传感装置，其特征在于：对于同一行的感测电极：所述驱动电路同时提供激励信号给部分感测电极执行生物信息感测，并提供所述第二参考信号给其余感测电极中的部分或全部感测电极。
  6. 根据权利要求5所述的生物信息传感装置，其特征在于：对于同一行的感测电极：所述驱动电路每次同时驱动部分感测电极执行生物信息感测，通过多次驱动，直到驱动完一行感测电极执行生物信息感测。
  7. 根据权利要求1-6中任意一项所述的生物信息传感装置，其特征在于：当所述驱动电路在提供所述激励信号给感测电极时，进一步接收来自感测电极输出的感测信号，以执行自电容式的生物信息感测。
  8. 根据权利要求1-6中任意一项所述的生物信息传感装置，其特征在于：所述生物信息传感装置包括多个传感单元，所述传感单元包括：
    所述感测电极；
    第一控制开关，与所述感测电极连接；和
    第二控制开关，与所述感测电极连接；
    所述驱动电路包括：
    扫描驱动电路，与所述多个传感单元中的第一控制开关和第二控制开关分别连接，用于驱动同一传感单元中的第一控制开关和第二控制开关分时导通；
    感测驱动电路，通过所述第一控制开关与所述感测电极连接，用于通过导通的第 一控制开关提供所述激励信号给感测电极执行生物信息感测；和
    参考信号产生电路，通过所述第二控制开关与所述感测电极连接，用于通过导通的第二控制开关提供所述第一参考信号给感测电极。
  9. 根据权利要求8所述的生物信息传感装置，其特征在于：对于同一列感测电极：当所述扫描驱动电路驱动其中一传感单元中的第一控制开关导通、第二控制开关截止时，驱动其余传感单元中的部分或全部传感单元的第一控制开关截止、第二控制开关导通，所述参考信号产生电路通过导通的第二控制开关提供所述第一参考信号给感测电极。
  10. 根据权利要求9所述的生物信息传感装置，其特征在于：所述感测驱动电路通过导通的第一控制开关提供所述激励信号给感测电极执行生物信息感测，并接收来自感测电极输出的感测信号，以获取生物信息。
  11. 根据权利要求9所述的生物信息传感装置，其特征在于：当所述扫描驱动电路驱动一行传感单元的第一控制开关导通、第二控制开关截止时，所述感测驱动电路通过导通的第一控制开关同时提供所述激励信号给部分感测电极执行生物信息感测，所述参考信号产生电路通过导通的第一控制开关提供同一第二参考信号给其余传感单元中的部分或全部传感单元的感测电极。
  12. 根据权利要求11所述的生物信息传感装置，其特征在于：所述驱动电路进一步包括多个数据选择器，所述多个数据选择器连接所述参考信号产生电路和所述感测驱动电路，每一数据选择器进一步通过第一控制开关连接部分传感单元的感测电极，所述数据选择器用于选择输出所述激励信号或所述第二参考信号给感测电极。
  13. 根据权利要求12所述的生物信息传感装置，其特征在于：所述驱动电路一次同时通过各数据选择器输出所述激励信号分别给一感测电极执行生物信息感测，并通过各数据选择器分别输出所述第二参考信号给同一行的其余感测电极中的部分或全部感测电极。
  14. 根据权利要求13所述的生物信息传感装置，其特征在于：所述生物信息传感装置进一步包括控制单元，所述控制单元与所述扫描驱动电路和所述多个数据选择器分别连接，用于控制所述扫描驱动电路驱动各行传感单元中的第一控制开关和第二控制开关的导通时序，以及通过控制所述多个数据选择器来控制输出所述激励信号与所述第二参考信号给感测电极的时序。
  15. 根据权利要求14所述的生物信息传感装置，其特征在于：所述生物信息传感装置进一步包括：
    多个扫描线群组，所述扫描线群组包括第一扫描线和第二扫描线；和
    多个数据线群组，所述数据线群组包括第一数据线和第二数据线；
    每一扫描线群组连接一行传感单元，每一数据线群组连接一列传感单元；
    所述第一控制开关包括控制电极、第一传输电极、和第二传输电极；所述第二控制开关包括控制电极、第一传输电极、和第二传输电极；所述第一扫描线连接所述扫描驱动电路和所述第一控制开关的控制电极；所述第二扫描线连接所述扫描驱动电路和所述第二控制开关的控制电极；所述第一数据线连接所述数据选择器和第一控制开关的第一传输电极；所述第二数据线连接所述参考信号产生电路和第二控制开关的第一传输电极；所述第一控制开关的第二传输电极连接所述感测电极；所述第二控制开关的第二传输电极连接所述感测电极。
  16. 根据权利要求15所述的生物信息传感装置，其特征在于：所述第一数据线用于传输所述激励信号和所述第二参考信号，所述第二数据线用于传输所述第一参考信号，所述扫描驱动电路通过所述第一扫描线、第二扫描线提供扫描开启信号给第一控制开关和第二控制开关，来控制第一控制开关和第二控制开关导通，通过所述第一扫描线、第二扫描线提供扫描截止信号给第一控制开关和第二控制开关，来控制第一控制开关和第二控制开关截止。
  17. 根据权利要求15所述的生物信息传感装置，其特征在于：所述生物信息传感装置进一步包括：
    第一参考信号线，连接所述参考信号产生电路和第二数据线，用于传输所述第一参考信号；
    第二参考信号线，连接所述参考信号产生电路和所述多个数据选择器，用于传输所述第二参考信号；和
    感测信号线，连接所述感测驱动电路和所述多个数据选择器，用于传输所述激励信号给感测电极以及传输来自感测电极的感测信号给感测驱动电路。
  18. 根据权利要求17所述的生物信息传感装置，其特征在于：所述生物信息传感装置包括生物信息传感器，所述生物信息传感器包括绝缘基板、所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线，所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线形成在所述绝缘基板上。
  19. 根据权利要求18所述的生物信息传感装置，其特征在于：所述各传感单元中的第一控制开关和第二控制开关均为薄膜晶体管开关，所述绝缘基板为玻璃基板。
  20. 根据权利要求8所述的生物信息传感装置，其特征在于：所述传感单元包括一第一控制开关和一第二控制开关，或，所述传感单元包括并联连接的二第一控制开关和并联连接的二第二控制开关。
  21. 根据权利要求18所述的生物信息传感装置，其特征在于：所述绝缘基板包括第一表面和与第一表面相对设置的第二表面，所述第一表面用于接收目标物体的触摸或接近输入，所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线设置在所述第二表面。
  22. 根据权利要求21所述的生物信息传感装置，其特征在于：所述多个传感单元的感测电极相较于所述第一控制开关、所述第二控制开关、所述多个扫描线群组、和所述多个数据线群组更靠近所述第二表面。
  23. 根据权利要求21所述的生物信息传感装置，其特征在于：所述第一控制开关、所述第二控制开关、所述多个扫描线群组、和所述多个数据线群组位于所述多个传感单元的感测电极背对所述绝缘基板的一侧。
  24. 根据权利要求21所述的生物信息传感装置，其特征在于：所述多个传感单元的感测电极覆盖所述第一控制开关、所述第二控制开关、所述多个扫描线群组、和所述多个数据线群组。
  25. 根据权利要求18所述的生物信息传感装置，其特征在于：所述生物信息传感器进一步包括所述扫描驱动电路、所述多个数据选择器、所述第二参考信号线、和所述感测信号线，所述扫描驱动电路、所述多个数据选择器、所述第二参考信号线、和所述感测信号线形成在所述绝缘基板的第二表面上。
  26. 根据权利要求25所述的生物信息传感装置，其特征在于：所述扫描驱动电路、所述多个数据选择器、所述第二参考信号线、和所述感测信号线设置在所述多个传感单元的周围。
  27. 根据权利要求25所述的生物信息传感装置，其特征在于：所述扫描驱动电路和所述多个数据选择器均包括控制开关，所述控制开关均为薄膜晶体管开关。
  28. 根据权利要求14所述的生物信息传感装置，其特征在于：每一数据选择器包括多个开关单元，每一开关单元包括第一选择开关和第二选择开关，所述第一选择开关包括控制电极、第一传输电极、和第二传输电极，所述第二选择开关包括控制电极、第一传输电极、和第二传输电极，其中，所述第一选择开关的控制电极和第二选择开关的控制电极与所述控制单元分别连接，所述第一选择开关的第一传输电极与所述感测驱动电路连接，所述第二选择开关的第一传输电极与所述参考信号产生电路连接，所述第一选择开关的第二传输电极和所述第二选择开关 的第二传输电极相连接、并连接至第一数据线。
  29. 根据权利要求28所述的生物信息传感装置，其特征在于：所述控制单元控制同一开关单元中的第一选择开关和第二选择开关分时导通。
  30. 根据权利要求18所述的生物信息传感装置，其特征在于：所述生物信息传感器进一步包括钝化层，形成在所述多个传感单元、所述多个扫描线群组、所述多个数据线群组、和所述第一参考信号线上。
  31. 根据权利要求30所述的生物信息传感装置，其特征在于：所述生物信息传感装置进一步包括控制芯片，所述控制芯片包括所述控制单元、所述参考信号产生电路、和所述感测驱动电路。
  32. 根据权利要求31所述的生物信息传感装置，其特征在于：所述生物信息传感器和所述控制芯片分别为裸片，所述控制芯片绑定在所述绝缘基板上；或者，所述控制芯片设置在一软性电路板上，通过所述软性电路板与所述生物信息传感器电连接。
  33. 根据权利要求8所述的生物信息传感装置，其特征在于：所述驱动电路进一步包括调制电路，所述调制电路用于统一调制所述驱动电路输出给所述多个传感单元的信号，以提高感测信号的信噪比。
  34. 根据权利要求1所述的生物信息传感装置，其特征在于：所述生物信息传感装置为自电容式的传感装置。
  35. 根据权利要求1所述的生物信息传感装置，其特征在于：所述生物信息传感装置为指纹传感装置。
  36. 根据权利要求1所述的生物信息传感装置，其特征在于：所述生物信息传感装置进一步包括绝缘基板、多个传感单元、保护盖板，所述多个传感单元设置在所述绝缘基板与所述保护盖板之间，所述保护盖板背对所述多个传感单元的一侧用于接收目标物体的触摸或接近输入，其中，每一传感单元包括一所述感测电极和与感测电极相连接的传感电路。
  37. 根据权利要求1所述的生物信息传感装置，其特征在于：所述生物信息传感装置进一步包括绝缘基板、多个传感单元、涂覆层，所述多个传感单元设置在所述绝缘基板与所述涂覆层之间，所述涂覆层背对所述多个传感单元的一侧用于接收目标物体的触摸或接近输入，其中，每一传感单元包括一所述感测电极和与感测电极相连接的传感电路。
  38. 根据权利要求36或37所述的生物信息传感装置，其特征在于：所述传感电路包括第一控制开关和第二控制开关，与所述感测电极均连接，其中，所述第一 控制开关用于控制是否传输激励信号给感测电极，所述第二控制开关用于控制是否传输第一参考信号给感测电极，所述第一控制开关与所述第二控制开关分时导通。
  39. 一种电子设备，包括权利要求1-38中任意一项所述的生物信息传感装置。
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